In this installment, the Missing Persons Unit (MPU) shifts from a standard disappearance to a complex web of abduction and revenge.

The overarching season mystery regarding Jason and Nikki's son, Keith, intensifies. Their daughter, Sidney , remains convinced the boy is an imposter. She follows him and finds him with a gun, which Keith later claims is only a pellet gun intended for self-defense against his former kidnappers.

The investigation begins when a foster care worker named Miguel goes missing. After he takes his own life at a train station, the team discovers he was trying to rescue a woman he loved who had been missing for two years. This leads the MPU to a rural farm where a man named Salgado has been kidnapping women from "corporate families" that exploited his land, forcing them to have children as a form of revenge.

Scott Caan as Jason Grant and Dania Ramirez as Nikki Batista.