Diane worries about her mother's pending grand jury trial. Andy and Bobby search for the killer of a mobster's son, which reveals a family affair. The lawyer of a suspect in a murder impedes Greg and Diane's investigation. The erratic son of the victim doesn't help much either and he has a thing for Diane. James and Adrianne get another shooting case that involves Andy and Bobby's suspect. The bullets are flying in NYC during sweeps' month.