The Nymph's Algorithm

The tenth fake laugh was the one that broke her.

Not the first, which had been merely irritating—a tinny, rehearsed ha-ha-ha that echoed off the limestone cliffs like a stone skipped badly. Not the fifth, which had made her left eye twitch and her fingers curl into the damp moss of her favorite sitting rock. Not even the eighth, when the boy with the perfect teeth and the rented linen shirt had thrown his head back so dramatically that a passing cormorant had startled mid-flight.

No. It was the tenth.

Leucothea, guardian of the saltwater lake on the island of Mljet, felt something ancient and venomous coil in her chest. She had watched empires rise and fall from these shores. She had seen Illyrian pirates drown in these very waters, had watched Roman patricians weep at the beauty of the fig trees she herself had coaxed from barren rock. She had outlasted Venetian galleys and Austrian archdukes and Yugoslav tourism campaigns. She had been here when the monastery on the islet was just a hermit’s desperate prayer, and she would be here when the last human forgot how to find this place without a glowing rectangle in their palm.

But she had never, in two thousand years of grudging patience, wanted to drag a mortal underwater by his own ridiculous hair as badly as she did at this moment.

“Okay, okay, from the top!” the boy called out, clapping his hands like a cruise director hyping a buffet. “Lena, can you—yeah, can you stand a little more to the left? I want the sun hitting the water behind me, but like, not in my eyes, you know?”

The nymph shifted her weight on the rocky outcrop above the eastern shore. Sunlight filtered through the dense pine canopy, dappling her bare arms in gold and shadow. She was, she knew, distractingly beautiful. Not in the manner of magazine covers or filter-smoothed Instagram posts, but in the way the sea is beautiful just before a storm—restless, deep, and slightly dangerous. Her hair fell past her waist in endless waves of deep brown, the color of wet earth after rain, and it moved even when there was no wind, because the wind answered to her and knew better than to tangle it without permission.

Her eyes were the problem, for anyone who looked too long.

They were green. But not the polite green of olive leaves or the soft green of submerged sea glass. They were the green of a forest fire at midnight, of venom bottled and held to candlelight, of something that had never been human and never wanted to be. Stranger still, they seemed to shift—pale jade when she was calm, deep emerald when she smiled, and something closer to black when she was angry. Right now, they were the color of a poisoned well.

Her skin had been kissed by every sun that had risen over the Adriatic for the past twenty centuries. It was the warm, deep gold of baked terra-cotta, flawless and seamless, unmarked by the passage of years that had no meaning to her. She wore almost nothing—a length of faded linen wrapped around her hips, a thin strap across her chest, both so old that the original color had long since surrendered to salt and sun. Her feet were bare, her toenails painted with crushed berry juice out of a habit she’d picked up from a Greek sailor in 312 BCE and never abandoned.

She looked, in short, like every Dalmatian tourist board’s fever dream of the Mediterranean made flesh. And she was furious.

“They cannot be serious,” she whispered to the olive tree beside her.

The olive tree, which was three hundred and seventy-two years old and had developed a personality that Leucothea could only describe as “retired bartender,” rustled its leaves in what might have been a shrug. They are always serious about nonsense, it creaked back. You know this. You’ve known this since the first time one of them asked you to move aside for a better photo of a rock.

“They’re filming a laugh,” she said, her voice flat with disbelief. “A fake laugh. For the tenth time. In my lake.”

It is a very nice lake.

“I will drown him.”

You said that about the Germans in ’92.

“The Germans were using floaties shaped like flamingos. They deserved it.”

You let them live.

“I let them live because their leader offered me schnapps and wept about his divorce.” She paused, narrowing those strange green eyes. “This one has no schnapps and no redeeming emotional arc. He is simply loud and beige.”

The olive tree had no response to that, mostly because it was true.

Leucothea turned her full attention back to the scene below.

The boy—and he was a boy, despite being perhaps twenty-eight and possessing the kind of jawline that launched sponsored content—was positioned on the wooden dock that jutted into the lake’s glassy surface. He wore beige linen shorts, a white shirt unbuttoned halfway to his navel, and the kind of woven leather sandals that cost more than a fisherman’s monthly salary. His name, she had gathered from his shouted instructions to his companion, was Leo. Leo the Adventurer, according to the logo on his portable ring light. His teeth were very white. His laugh, even the real one she’d heard exactly once when he’d nearly dropped his camera in the water, was perfectly fine. But he refused to use it.

“Lena, can we get more of a—you know—carefree vibe? Like I just discovered this place by accident, and it’s changing my life, and I’m so humbled, but also sexy?”

The young woman behind the camera, Lena, sighed audibly. She was maybe twenty-three, wore black leggings and a faded hoodie despite the July heat, and carried herself with the exhausted dignity of someone who had seen her boss eat a deconstructed avocado rose and pretended it was normal. “Leo, we’ve been here for three hours. The light is shifting. Can we please just use take seven?”

“Take seven made my left eye look smaller.”

“Your left eye is smaller.”

“That’s not the brand, Lena. The brand is symmetrical wonder.”

Leucothea pressed her palm against the rough bark of the olive tree and breathed. The air smelled of salt and pine and the faint, sweet rot of figs falling uneaten from the branches above her. Somewhere across the lake, a real tourist—an elderly Austrian couple who had brought actual books and actual sandwiches and no tripod whatsoever—sat on a bench and squinted at the commotion with the quiet judgment of people who had paid good money for tranquility.

Do the thing, the olive tree suggested.

“What thing?”

The eye thing. The one you did to the Venetian who tried to build a villa on my roots.

“That was a thousand years ago.”

He cried for three days and saw only the color purple. Very effective. Very funny.

Leucothea considered it. She could, with a thought, make this boy see the lake as a endless desert. Or make his precious camera lens fill with the image of his own face, aging and disappointed, reflected back at him until he screamed. She had done worse to those who desecrated her waters. She had done creative things to fishermen who threw plastic into her coves.

But something stopped her.

Perhaps it was the way Leo had, for just a moment between take six and take seven, stopped pretending. His shoulders had dropped. His manufactured smile had collapsed into something almost human. He had looked at the lake—really looked—and for three seconds, his face had been unguarded. He had seemed, against all evidence, like a person who might be capable of wonder.

Then Lena had said “rolling,” and the mask had slammed back into place.

Leucothea hated the mask more than she hated the fake laugh. The mask was a lie not to an audience, but to the world itself. It was a refusal to be changed by beauty. And that, to a creature who had spent millennia guarding a place that could make saints weep, was blasphemy.

“Okay,” she murmured. “New plan.”

New plan? The olive tree perked up. I like new plans. Last new plan involved fire ants.

“That was an accident.”

They were very organized fire ants.

“This plan is different.” She pushed off from the tree, her bare feet finding purchase on the warm limestone. “This plan is personal.”

She descended toward the shore without making a sound. The pine needles cushioned her steps. The cicadas, who loved her and feared her in equal measure, fell silent as she passed. By the time she reached the water’s edge, she had decided exactly how to begin.

Leo was, at that moment, attempting take eleven.

“Okay, so I’m gonna walk to the end of the dock, and then I’m gonna turn around and laugh like I just—like I just saw a dolphin. But like, a surprised dolphin. A grateful surprised dolphin. Lena, are you getting this?”

“I’m getting you complaining about dolphins that don’t exist.”

“They exist in the spirit of the moment.”

“They really don’t.”

Leucothea stepped out of the treeline and onto the gravel path that led to the dock. She did not announce herself. She did not need to. The light seemed to bend around her, the air thickened, and even the lapping of the lake against the pilings softened to a hush. Lena looked up from her camera first. Her mouth opened. Her hand dropped from the focus ring.

Leo, still walking backward toward the end of the dock, kept talking. “—and then I’ll do the thing where I look at the water and shake my head like I can’t believe how beautiful it is, but like, authentically can’t believe—Lena? Why are you looking at me like that?”

“Behind you,” Lena whispered.

Leo turned.

And there she was.

The nymph stood at the foot of the dock, one hand resting lightly on the weathered wooden railing, the other loose at her side. The afternoon sun set her brown hair ablaze with copper highlights, and a breeze that existed only for her lifted the ends of it like underwater fronds swaying in a current. Her green eyes—those impossible, shifting, hypnotic green eyes—fixed on his with an expression that was equal parts curiosity and barely suppressed violence.

She smiled. It was not a kind smile.

“You are filming a fake laugh,” she said. Her voice was low and clear, with an accent that sounded like no country and every century. “In my lake. For the tenth time.”

Leo blinked. His hand, still holding his phone, twitched. “I’m sorry—do I know you? Are you—is this like a brand activation? Did the tourist board send you?”

“Did the tourist board send me.” She repeated the words as if tasting something rotten. “No. The tourist board did not send me. The tourist board does not know I exist. The tourist board would, if it had any sense, pray that I continue to forget it exists.”

“Okay,” Leo said slowly, holding up his free hand in a placating gesture that made her want to bite it off. “Okay, I think there’s been a misunderstanding. I have a permit for this location. The manager at the national park office gave it to me personally. I can show you—”

“I do not care about your permit.” She stepped onto the dock. The wood did not creak beneath her feet; it seemed to hold its breath. “I care about the fact that you have stood on this spot for three hours, manufacturing joy like a factory producing shoes that do not fit. I care that you have not once, not once, looked at this place and simply let it be. You have filmed it. You have framed it. You have tagged it. But you have not seen it.”

Leo’s jaw tightened. For a moment, the mask flickered—not cracking, but flexing. “Look, I don’t know who you think you are, but I have two hundred thousand followers who do see things through my content. I bring attention to beautiful places. I help local economies. My engagement rate is—”

“If you say your engagement rate, I will throw you into the lake.”

“You can’t just—”

“The lake is twenty-two meters deep at its deepest point,” she continued, walking closer. Each step was deliberate, predatory, and utterly silent. “It is connected to the sea through a narrow channel that the Romans cut. There are eels in this lake that are older than your country. There are caves beneath the surface that no human has ever entered. And you—you—are standing on a dock in rented sandals, demanding that your assistant capture the perfect angle of your left eye.”

Behind Leo, Lena had lowered the camera entirely. She was watching the exchange with the expression of someone who had just realized she might be witnessing something she could never post online.

Leo, to his credit, did not back down. He straightened his shoulders, which were broad and tanned from a photoshoot in Mykonos the previous week, and met her strange green gaze. “What’s your name?”

“Leucothea.”

“Leucothea.” He said it carefully, like a word he was trying to memorize. “That’s Greek, right? White goddess?”

She raised an eyebrow. “You know Greek?”

“I dated a classics major for six months. She made me learn the alphabet. It didn’t stick, but some of the myths did.” He tilted his head, studying her with an intensity that was not, she realized with irritation, entirely professional. “You’re not a local, are you? I mean, you look like you could be, but there’s something—” He gestured vaguely at her hair, her eyes, the way the light seemed to pool in the hollow of her throat. “—different.”

“I am more local than the limestone you’re standing on.”

“That’s not an answer.”

“No,” she agreed. “It isn’t.”

The silence stretched between them. Across the lake, the Austrian couple had given up on their bench and were walking toward the exit, muttering about “social media parasites” in German. The cicadas, sensing the shift in power, resumed their song.

Lena cleared her throat. “Leo, the light is really—”

“One more minute,” he said without looking away from the nymph.

Leucothea crossed her arms beneath her breasts, a gesture that was entirely unconscious but had, she knew, certain effects on mortal men. “I have a proposal.”

Leo’s eyebrows rose. “A proposal?”

“You will stop filming. You will put down your phone. You will sit on that rock”—she pointed to a flat limestone shelf at the water’s edge, shaded by an overhanging bay tree—“and you will look at my lake for one hour without speaking, without recording, and without performing.”

“And if I refuse?”

“Then I will ensure that every photo you have taken today contains a blurry, unexplained figure in the background that your followers will become obsessively fixated on. They will ask about it in every comment. They will demand to know who she is. And you will never be able to explain, because no one will ever see me again.”

Leo stared at her. Then, slowly, a real smile crept across his face. Not the performative, teeth-first grin from the takes. This one was smaller, crooked, and somewhat dazed. “You’re serious.”

“I am never not serious.”

“You’re also—” He stopped himself. Swallowed. “Never mind.”

“What?”

“Nothing. It’s just—your eyes. They’re really...” He trailed off, apparently unable to find a word that didn’t sound like a pickup line.

Leucothea felt something unfamiliar move through her chest. It was not warmth—she was too old and too bitter for warmth. But it was something adjacent to warmth. Something like the first crack of sunlight through winter clouds. She crushed it immediately.

“The rock,” she repeated. “One hour. Or I haunt your Instagram feed for eternity.”

Leo looked at Lena. Lena shrugged helplessly. He looked at his phone, at the dock, at the impossible woman in front of him. Then he sighed, handed his phone to his assistant, and walked past Leucothea toward the limestone shelf.

“Sixty minutes,” he said over his shoulder. “But if I miss golden hour because of this, I’m billing you for my therapist.”

Leucothea watched him sit down, legs crossed awkwardly on the warm stone, and turn his face toward the water. He did not reach for a phone. He did not pose. He simply sat.

Behind her, the olive tree rustled in what was unmistakably laughter.

Oh, it creaked. You are in so much trouble.

“Shut up,” she muttered.

But she sat down on the dock, dangled her bare feet in the saltwater, and did not look away from him for the entire hour.

Not once.