A young model named Danielle meets a man named Phillip on a game show and invites him back to her Staten Island apartment, which she shares with her mysterious twin sister, Dominique. The morning after their date, a series of shocking events leads to a gruesome discovery in the apartment. This incident draws the attention of a tenacious reporter named Grace Collier, who happens to witness something alarming from her own window that directly involves Danielle’s apartment. Grace's curiosity is piqued, and she is determined to uncover the truth, leading her to delve deeper into Danielle’s complex and secretive world.

As Grace's investigation progresses, she discovers that Danielle and Dominique share a dark and troubling past, rooted in a bizarre and traumatic childhood. Her inquiry uncovers a twisted story involving psychiatry, conjoined twins, and a separation surgery that has a profound impact on the sisters' lives. The deeper Grace digs, the more she realizes that the line between innocent and guilty, victim and perpetrator, is dangerously blurred. Her pursuit of the truth sets off a chilling chain of events that draws her into a web of deceit, madness, and murder. This relentless quest not only threatens Grace's life but also forces her to confront the horrifying reality of what lies behind the façade of normalcy.