Jinny and Magda try to solve the murder of a suburban mother who was going through a difficult divorce and fighting to get her toddler into an exclusive kindergarden. C.D. and Nate investigate the murder of an evil stalker. Kate's daughter returns for a visit and has several surprises in store.

A 12 year old girl goes to school with drugs.

Jinny vows to avenge her brother's murder. Kate pays a visit to The Division and has mixed feelings about a new boss taking over. CD tells Nate her fears of almost losing him after he nearly got shot. CD & Nate go to a bar to meet a suspect but end up in a shootout. Raina thinks about dating Johnny. Magda ends her affair with Jonah. Jinny into Ray the man who killed her brother. Kate thinks about leaving her job until she finds out that the new boss is planning to fire Jinny. In a season-ending cliffhanger, one of The Division is shot.