Sipowicz suspects a private investigator of bilking a father for the past six months in a scheme to find the man's runaway daughter. Meanwhile, Kelly and Sharon LaSalle investigate the shooting death of a 13-year-old boy and try to apprehend the gang member responsible. But when the killer escapes from the precinct, and injures LaSall in doing so, Kelly and the other detectives must try to stop the murdered boy's father who plans to go after apprehends the killer himself. Also, LaSalle has a chance to move out of the precinct and into a more regular routine of detective work in which she takes the offer and leaves the 15th Precint for good.

Simone and Sipowicz get another case involving the shooting of a rap artist who refuses to cooperate with them in the identification of his assailant. Meanwhile, Abby tells Medavoy that she and Kathy are trying to start a family and asks him to donate his sperm to her so Abby will get pregnant. Officer Szymanski, the racist cop who pulled over Fancy, tells him that he thinks Fancy was one of the ones responsible for his being set-up and caught in the alleged theft of a drug dealer's money. Also, Simone is approached and propositioned by FBI agents to help them with their ongoing investigation into the affairs of mobster Joey Salvo. Elsewhere, the night shift detective, Vince Gotelli, tells Simone and Sipowicz about a heart medical condition of his.

An unreliable witness and an overzealous detective hinder a murder investigation; a con artist scam leads the squad to a sex-slavery operation; McDowell agrees to join Sipowicz and Theo at a theme park.