Mike Regan is a successful aviation tycoon who lives a picture-perfect life with his family in their state-of-the-art smart home. He is close to securing a lucrative new deal that would cement his business reputation. During a major presentation, he experiences a technical glitch and is subsequently rescued by Ed Porter, a young and savvy IT consultant. Grateful, Mike befriends Ed and invites him into his private life, impressed by his skills and potential for helping streamline his company's impending digital transformations. Mike consistently turns to Ed for technical support and also introduces him to his family, overlooking Ed's increasingly invasive behavior.

As Ed grows more entangled in the Regan family's affairs, his seemingly benign interest subtly shifts into an ominous obsession. When Mike attempts to distance himself from Ed due to his unsettling behavior, Ed uses his technological know-how to launch a sinister campaign against Mike and his loved ones. Utilizing his deep access into their connected devices and data, Ed's actions escalate to a chilling cyber-stalking spree that puts the family's privacy and safety at serious risk. The tension mounts as technology becomes both a weapon and a shield in this high-stakes battle of wits, forcing Mike to confront the vulnerabilities of the digital age to protect everything he holds dear.