Deeply shaken after a brutal attack, Bailey Carpenter struggles to reclaim control over what had once seemed like a neatly-ordered life. Unable to face her job, her friends, or even the world outside her apartment, Bailey is trapped with her thoughts, replaying the attack in her desperate search for every detail that will help the police uncover the identity of her unknown assailant. Bailey sees her attacker in the face of every stranger, and is unable to trust anyone other than her half-sister Claire, and Claire's snarky teenage daughter Jade.
To pass the time in her lonely apartment, Bailey plays with the binoculars she once used in her career as a private investigator, scanning the high-rise buildings around hers for entertainment. She quickly discovers her favorite source: a handsome, wealthy playboy in the apartment across the street. As she watches him strut around his apartment, she starts to wonder if he's putting on a show—with her as his intended. Looking out the window one night, she seems him looking tauntingly right back at her, binoculars in hand. Could it be the assailant she's been so desperate to identify has been right there, watching her, the whole time? The police believe she's crying wolf, and Claire tries to convince her she's wrong. Doubting her own sanity, Bailey only has Jade left to turn to, and together the two hatch a dangerous plot to discover just what exactly is going on in the apartment across the way.