At 3:00 a.m., Fiona Langley woke with a sudden jolt, her heart slamming against her ribs. A faint click echoed down the hallway, pulling her senses into sharp focus. That sound was unmistakable—the door to her daughter Serena Voss’s bedroom. Again.

For weeks, Fiona had been sensing a creeping unease, a quiet warning that something was terribly wrong. Serena, who had always been lively and talkative, had grown withdrawn. She flinched at sudden noises, avoided her father’s gaze, and often crossed her arms as if protecting herself. Whenever Fiona asked what troubled her, Serena would force a smile that never reached her eyes.

Three nights earlier, Fiona had noticed a fresh bruise on Serena’s forearm. Panic gnawed at her rational mind, but she needed proof. She hid a small nanny-cam inside Serena’s favorite stuffed fox, a birthday gift, convincing herself she might be overreacting. Yet the thought of being wrong seemed less frightening than the possibility of being right.

And now, at 3:00 a.m., the device confirmed her fears.