A young, interracial couple, Chris and Lisa Mattson, move into their dream home in suburban California, seeking a fresh start. Their idyllic life takes a dark turn when they meet their next-door neighbor, Abel Turner, a stern LAPD officer. At first, Abel's behavior appears merely overbearing and intrusive, but it soon escalates into deliberate harassment. Disapproving of their relationship, Abel enacts a series of increasingly aggressive and invasive actions meant to intimidate and unsettle them, leading to rising tensions and fear.

Chris and Lisa find themselves entangled in a psychological battle with Abel, as they struggle to maintain their sanity and marriage amidst his escalating torment. They seek help from authorities and neighbors, but Abel's position as a police officer complicates their efforts. As the couple digs deeper into Abel's life, they uncover disturbing secrets that drive the conflict to a boiling point. The relentless pressure threatens to push all parties involved to their breaking limits, setting the stage for an intense and unpredictable climax.