Mannion gets another chance to capture a contract killer who eluded him 25 years ago when the chief learns the hitman is in D.C. In other events, Nancy gets hurt while pursuing a purse snatcher and receives more bad news in the hospital, Kendall has to apologize for allowing her picture to be taken with a mayoral candidate who's critical of the police department and Ella begins to question whether she should get married.

A reporter accuses Mannion of committing a war crime in Vietnam 32 years ago by ordering 18 innocent civilians to be killed, and one of the chief's fellow soldiers confirms the story. Also, Temple and Debreno search for a  fifteen year old boy they suspect is planning a murder for his gang initiation.