After Danny witnesses a drive-by shooting, he butts head with the detective assigned to the case; a childhood friend of Jamie's is convinced that she has single-handedly solved a cold case murder.

Baez confides in Danny and asks for his help in proving her innocence after she finds a corpse in her front yard. Also, Erin struggles to find a peaceful solution when she receives harsh case notes from her boss, Jamie and Eddie butt heads over the handling of a young cop's punishment, and Frank makes his whole team attend therapy after Gormley exhibits troubling behavior.