Sidney, upset that Jason and Nikki don't believe her claims about Keith, comes clean about the details surrounding the day of his disappearance, causing Jason to cast serious doubt on the boy claiming to be his son. Meanwhile, Mike's police mentor brings a missing officer's case to the MPU team.

The MPU works to track down the kidnapped son of a doctor, but the case takes a turn when his mother gets in direct contact with the kidnapper. Meanwhile, Kemi expresses her concerns for Sidney's wellbeing to Nikki and Jason.

Jason and Nikki utilize a twin sister when a missing person case turns into a possible murder investigation. Meanwhile, Kemi helps C with his dating life and Keith gets reckless.

A foster care worker is reported as missing, but after he ends his own life, the MPU starts to investigate a pregnant woman he was seen with who has been missing for two years. Meanwhile, Sidney follows Keith and fears he may be dangerous.

Jason and Mike search the Allegheny Mountains to find a missing couple. Meanwhile, Keith joins a trauma therapy group and bonds with another patient.

Jason, Nikki and the MPU team investigate when a woman runs down a man and forces him to get in her car at gunpoint. Meanwhile, more information about Keith's kidnapper comes to light.

The MPU searches for a college student after she goes missing during a house party. Meanwhile, Sidney and Keith try to adjust to normal life again.

The MPU investigates the abduction of a young child, whose abduction is likely revenge related to her father's work.

When a bride goes missing on her wedding day, Mike and Kemi discover the woman was living a deceptive life. Meanwhile, the mystery surrounding Keith's disappearance starts to unravel as he tells Jason and Nikki more details about his time in captivity and leads them to a cabin where they find a horrifying scene.