In the Season 3 premiere, Grace is still missing; Ethan heads to Chicago to investigate a notorious attorney; and DEA Agent Harper Deakins' investigation of a Chicago gang takes a bad turn when a routine stakeout goes wrong.

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

Grace heads to Chicago to work with Ethan; Marlon appears on Harper's DEA radar; Harper's confidential informant, Lobo, is made; and Ethan finds Marty's leak.

Harper is hit hard by Lobo's death; Ethan tells Marty the real reason he's in Chicago; Talia causes problems for Marlon; Grace and Ethan spy on Marty and the General; and Grace follows a dangerous lead.

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 and George work on their relationship while hiding from Roberts; Marlon strives to regain control following Cups' death; Talia tries a fresh start; and Harper follows the money trail, which leads her to Marlon.

Patrick investigates who shot at Harper, whose efforts to nail Marlon lead her to try and flip Talia. Ethan, meanwhile, turns himself in.

Ethan is stuck in prison; Roberts is arrested; Marty and the general have a sparring match; Harper leaves Jack and stays with Patrick; and Talia plans her next move after a fight with Marlon.

Marty refuses to help Marlon, whose business is in jeopardy; Harper questions Patrick; Ethan decides what's next now that he's free; and Talia sets up Marlon.

Harper contains Patrick; Marlon is arrested for Talia's murder; Ethan makes a new deal with Marty, who learns that Marlon betrayed him; and Harper breaks the Hutchings' murder case wide open.