Pre-wedding jitters put Sipowicz in a rare form of panic whereas Sylvia remains perfectly calm. While investigating a murder in Chinatown, Russell's drinking problem makes her miss getting a gun off a suspect and she finally admits to Simone about her alcoholism. Meanwhile, Fancy's brother, Reginald, is still having problems with his racist sergeant and his belligerent attitude has resulted in him being investigated by Internal Affairs. So Fancy, Simone, and the squad work together to help clear Reginald of any misconduct. Martinez finally goes out on a date with Lesniak and asks her to be his date for the wedding. At the ceremony, Simone is Sipowicz's best man, Sylvia's father escorts her down the aisle and even Andy Jr. makes it just in time for the ceremony. Medavoy brings his ex-wife to the wedding while a lonely and jealous Donna painfully watches from afar.

Medavoy starts a bet with Sipowicz to see who can lose the most weight in a single month. Afterwards, Sipowicz and Simone help out Detective Stuart Morrissey on his investigation in the case of a missing baby. Meanwhile, Martinez campaigns to become the elected delegate for the squad and his opponent, Detective Vince Gotelli, is determined to win the seat himself. Also, Simone makes a deal with Henry to let him share ownership of the building.

Danny wakes up in Diane's bed. Andy and Katie get Theo's test results. A former colleague of Bobby's reaches out to Diane from prison. The team investigate a series of cab-driver shootings.

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.