Frank is put on the spot when a supporter for the mayor elect is found dead and Jamie goes on his first undercover assignment.
Danny tries to juggle investigating a case with trying to have a romantic weekend with Linda. Meanwhile, Jamie goes deep undercover into a crime family.
Danny accompanies a dangerous ex-mobster who is helping him find bodies on cold cases in exchange for leniency for his son on grand theft auto. Meanwhile, Jamie works undercover in a boiler room operation, looking for a secret about the Sanfino family.
When Frank's close friend, a high-profile reporter, is almost assaulted while in town investigating a story, Danny and Jackie attempt to track down her would-be attacker. Meanwhile, Jamie's undercover case comes to a head.
Danny and Jackie investigate the suspicious death of a high-rolling investor who sustained injuries in a fight, yet his hands are unmarked by trauma.
