When diplomatic immunity complicates a child abuse case for Danny and Baez, Frank intervenes, despite not having jurisdiction on the case. Also, a robbery occurs while Eddie and Jamie are on a double date with Eddie's boyfriend and his sister, and they are forced to step in.

While investigating the murder of a man who killed a mother and son years earlier while driving drunk, Danny and Baez are torn between doing their job and finding justice after discovering the connection between the suspect and the victim. Also, Anthony is conflicted when Erin asks him to wear a wire to incriminate his old friend who is involved with the Russian mob.