Grace is still missing. Ethan heads to Chicago to investigate notorious attorney Marty Stein. DEA Agent Harper Deakins' investigation into one of Chicago's deadliest gangs takes a turn when a routine stakeout goes wrong

Grace works to escape. Ethan reconnects with his father. Escalating gang warfare spills into the suburbs. Ethan investigates Marty's leak at a party, where he meets Marlon Dinard, who is not what he seems.

Talia is arrested, which causes a headache for Marty; Harper uncovers another clue in Hutchings' death; and Ethan searches for Grace and tries to rescue his father before it's too late.

Ethan deals with an unexpected gunman and questions whether Mia can be trusted. In other events, Marty tries to contain the damage after the audio of Talia's death is leaked.

Ethan and Mia learn who the assassin is; Marlon contemplates going straight; Marty battles public opinion; and Harper harasses Marty's clients while trying to dig up dirt on him.