Chapter 1 - THE LAST LIGHT
The kick came without a warning. Vivian Whitmore's black shoe struck three-year-old Lily at the edge of the indoor pool, sending the little girl backward into the blue water.
At that same instant, the ceiling lights snapped off. The underwater lamps vanished, leaving one white splash hanging in darkness and the sharp echo of a child's broken cry.
For a heartbeat, Vivian stood motionless on the marble. Her reflection had disappeared with the light, but her breathing remained steady as Lily struggled somewhere beyond the pool's silver edge.
“Somebody help me!” Lily cried. Water swallowed the last word, and the sound cut through the enormous room like a door slammed inside a church.
In the east hallway, Ava Whitmore heard the splash. Seventeen years old and wearing worn canvas sneakers, she had been searching for her little sister since dinner ended.
She reached the pool entrance three seconds later. In the faint red glow of the emergency strips, she saw spreading ripples, an empty pool edge, and her stepmother turning away.
“Where's Lily?” Ava demanded. Vivian offered no answer. She disappeared through the doorway as Ava's gaze caught a tiny pink sleeve sinking beneath the surface.
Ava did not stop to remove her shoes. She jumped, striking the cold water hard enough to steal her breath, then forced her eyes open against the darkness.
The pool was deeper than she remembered. Her fingers swept past smooth tile, brushed empty water, then found a small wrist moving weakly beneath the surface.
She seized Lily under the arms and pushed upward. When the child's face broke into the dim red light, Ava held her close and kicked toward the steps.
“I'm here, sweetheart. I've got you.” Lily coughed against Ava's shoulder, her entire body trembling as Ava fought to keep both their heads above the black water.
The steel handrail appeared under Ava's reaching hand. She pulled Lily toward the shallow steps, placed her on the highest submerged tread, and climbed behind her.
For a terrible moment, Lily only stared. Then a rough cough shook her small chest, followed by a frightened sob that made Ava's knees nearly buckle with relief.
Ava lifted her sister onto the dry landing. Water ran from her jeans, pooled around her sneakers, and slipped through the grooves between expensive white marble tiles.
The mansion's pool room was all glass and polished stone, built to impress people who rarely swam. Tonight, its perfect geometry made the dark feel endless.
“Where did she go?” Lily whispered. She was staring at the entrance, where Vivian had stood only seconds earlier, her black dress visible against the hallway lights.
Ava followed her gaze. The hall beyond the glass was brightly lit, but empty. Vivian was gone, and the door was shut tightly against its frame.
Ava gathered Lily in her arms and hurried to the glass door. She twisted the handle. Nothing moved except the loose metal fitting beneath her palm.
She pulled again, harder this time. A dry mechanical click answered from the far side, and a little amber light above the lock blinked once.
Someone had locked them inside from the hallway. Ava had never seen that amber light before, and she knew the door was supposed to open freely in emergencies.
She tested the handle a third time, then stopped. Lily was shivering against her, and anger would not help if the child needed medical attention.
“Look at me, Lily.” Ava crouched to her sister's height. “You're with me. Keep talking to me, okay? Tell me about your rabbit.”
“Button has one ear,” Lily murmured through chattering teeth. Her favorite stuffed rabbit was upstairs, probably abandoned on the pink blanket where Ava had last seen it.
“That's right.” Ava pressed a kiss to Lily's wet hair. “And Button is waiting for you. We're going to get back to him.”
Ava knew just enough about water emergencies to be frightened by what she did not know. Lily was coughing and breathing, but she needed a doctor immediately.
Their mother, Grace, had insisted that both daughters learn to swim. She had made Ava practice reaching for the pool wall before she ever let her enter deep water.
Grace had been dead for nearly two years. Ava heard her voice now anyway, calm and practical: First make sure your sister can breathe. Then find help.
At the wall beside the lockers, a red emergency telephone hung behind a clear cover. Ava carried Lily toward it, ignoring the way cold water dragged at her clothes.
She lifted the receiver. There was a burst of static, then silence. She pressed the call button twice, but no voice answered from the security station.
Ava examined the lower edge of the unit. A fresh scratch ran across its mounting screws, and a short cable hung loose inside the cracked plastic seam.
That cable had not been loose yesterday. Her stomach turned as she remembered Vivian supervising a contractor near the pool's control cabinet that very afternoon.
Vivian had smiled when Ava asked questions. “A little maintenance,” she had said. “Don't worry yourself about grown-up decisions.”
Lily leaned against the wall and coughed again. Ava opened a linen cabinet, grabbed the largest dry towel, and wrapped it securely around her sister's shoulders.
The little girl's fingers clutched the towel's edge. Ava rubbed her back gently, searching the vast room for an alarm, a usable phone, anything that could reach another person.
Her own phone was in her back pocket. She pulled it free and pressed the side button, but the screen remained black beneath a sheet of trapped water.
Ava stared at the dead screen, furious with herself for bringing it into the pool. Then she remembered that Grace had always taught her to solve one problem at a time.
She scanned the ceiling. A red emergency strip glowed along the south wall, fed by its own battery. Somewhere beyond that wall ran the old maintenance corridor.
The mansion was built long before Vivian arrived. Ava had explored its servant staircases as a child, racing her father from one hidden doorway to another.
A brass plaque near the towel cabinets still read MECHANICAL ACCESS. Below it sat a narrow metal service panel, half concealed by a decorative bench.
Ava set Lily on the bench and checked her breathing again. The child was alert, but frightened and cold; every passing minute made Ava's need for help more urgent.
“Stay right beside me,” Ava said. “I'm not leaving you. I just need to see whether somebody can hear us through this wall.”
She dragged the bench away, its feet scraping loudly across marble. Behind it, a small inspection grille covered a dark passage barely wide enough for a person.
Ava struck the grille with the heel of her palm. The noise boomed down the pipework, and both sisters froze, listening for an answering sound.
Nothing came. Beyond the glass entrance, the long hallway stayed empty, displaying perfect chandeliers and the polished quiet of a house hiding something terrible.
Then Lily gripped Ava's sleeve. “She said you couldn't find me,” the child whispered. “She said you'd go away, too.”
Ava felt the words hit harder than cold water. She knelt beside Lily and held her face gently, forcing herself to speak without letting her voice break.
“I'm not going away,” she said. “Not tonight. Not ever because somebody tells me to. You and me, Lily. Always.”
From behind the inspection grille came a faint metallic vibration. Ava leaned closer. It sounded like an old pipe, or footsteps moving slowly on the other side.
May you like
She hammered three deliberate blows against the metal. The vibration stopped. For several seconds, nothing moved at all, until someone answered with two unmistakable knocks.
Ava turned toward Lily, hope flashing through her fear. She had no idea who was beyond that wall, but they were not alone anymore.
