Chris, a wealthy tech entrepreneur, grapples with his impending divorce from his ex-wife Jamie Decker. As he delays signing the divorce papers, he encounters a delightful young woman named Sky during a late-night visit to the supermarket. Offering her a lift when her taxi falls through, their chemistry sparks as they reach her motel. Sky hesitates to leave, voicing concerns about her disruptive roommate, Lisa. In a bid to ease her troubles, Chris suggests she wait at his place for a while, leading to an intimate night together. However, their blossoming relationship faces jeopardy as Sky returns to a furious Lisa the following morning.
Determined to maintain their connection, Chris ventured to find Sky at her job, only to stumble upon a break-in attempt on his car. When an altercation ensues, and Chris is left with a broken leg, Sky selflessly steps in to care for him. She gains access to Chris's high-tech home security system—Watchdog, a program he created but which played a role in the collapse of his marriage. Meanwhile, complications arise when Ronald, their landlord, discovers Lisa’s tragic demise in her motel room. He unwittingly identifies Sky to the police, despite the absence of any records on her.
As Chris's ex-wife, Jamie, learns about his injury, she decides to visit with their daughter, Willow, aiming to uplift his spirits. Ready to accept his divorce, Chris feels optimistic about moving on. But chaos ensues when he notices his phone is missing and learns about the eerie news surrounding Lisa’s death. When Sky arrives with a meal, she reveals her darker side, admitting to Lisa's murder and her ulterior motive of infiltrating Chris's life to execute a meticulous plan. She traps him in a wheelchair, only to drill into his broken leg for access to his bank details.
Sky’s ambitions are ruthless, as she transfers millions from his account while holding Willow's safety over Chris’s head. In a twist of fate, Ronald discovers a telescope that had been used to surveil Chris’s movements, revealing Sky's well-laid plans. As the tension escalates, Ronald attempts to exploit the situation but ends up facing Sky's wrath as she dispatches him in a deadly confrontation.
Just when Chris finds a chance to escape, he is captured again by Sky’s stepfather, Sebastian, leading to a sinister revelation about their relationship. Time runs short as Sky and Sebastian concoct a plan to secure millions in bonds by manipulating Chris. When Chris's family unexpectedly shows up, the situation becomes dire. In a desperate move, Willow cleverly escapes through a vent, triggering a series of events that spiral into chaos and violence.
As the standoff intensifies, and after grievous injuries are inflicted, an unexpected ally emerges. In a shocking twist, Willow takes decisive action against Sky, delivering a fatal shot that brings a close to the chaos. The strands of deception and betrayal culminate in a gripping finale, leaving Chris to grapple with the dire consequences of a world turned hostile and sinister.
