In the Season 2 finale, Wozniak faces the ally who betrayed him and makes his most difficult choice yet. Meanwhile, Stahl's plan to take Harlee down for murder finally pays off, forcing Harlee to get dangerously close to the man who's obsessed with her. In the end, Harlee and Wozniak's desperate efforts to save themselves and the crew lead to shocking consequences for both.
Harlee helps Nava cover his tracks after a violent encounter, revealing a side of herself he's never seen before; Wozniak faces a ghost from his past in order to take down a new enemy; and Stahl's quest for the truth about Miguel is boosted when he receives a critical piece of information.
Harlee and Wozniak lead the crew on a dangerous mission to steal Bianchi's secret ledger and take down the mobster once and for all. But the plan takes a tragic turn, forcing Harlee to turn to an unlikely source for help.
Harlee and Wozniak lead a manhunt for the gunmen who ambushed the crew and unearth the key to taking down Bianchi; the crew bands together against the threat of Verco, who has finally obtained evidence of their corruption; and Stahl, suspended from the FBI, goes rogue to complete his quest to link Harlee to Miguel's death.
Harlee learns that someone is texting Cristina as her dead ex, Miguel; the case of a missing kid leads Wozniak to a local dealer who uses underage mules, which reminds Loman of what their unit is all about; and the crew gets caught in an ambush.
Wozniak goes after Bianchi for breaking their agreement; Harlee tries to unite the team around an illegal mission to repay Tufo's brother's debt to a local drug dealer; Stahl makes good on his threat to go after the crew; Wozniak faces the impossible decision of choosing between his team and Ayres just as his son, Nate, makes an effort to reunite.
After Harlee's confession that she has been informing for the FBI, the crew grapples with Harlee and Wozniak's betrayal; and with their team falling apart, Harlee and Wozniak come up with a desperate plan to neutralize Bianchi. However, their actions have unforeseen consequences because the Mafia fires back.
Harlee and Wozniak investigate Caroline's murder, putting Harlee and Nava's relationship in an awkward place; Wozniak focuses on determining which member of his crew is informing to Verco; and Loman uncovers a deep secret.
The Mafia seeks revenge on Harlee by framing her for murder; Wozniak fights to keep his cop family together when evidence of an old crime puts pressure on the already splintering team; and Stahl cozies up to Cristina and gets closer to the truth about Miguel.
Realizing that Stahl will stop at nothing to arrest Julia Ayres, Harlee decides to investigate on her own and determine whether there's any truth in his allegations of Ayers' active business with the mob. Meanwhile, Wozniak is confronted with a drug case that forces him to face the darkest demons from his past, his daughter's death, while exposing the origin of his loyalty to Ayres.
After Wozniak refuses to play ball with the FBI, Stahl turns up the heat on Harlee, who lands in the middle of Wozniak's dangerous plan to free himself from the Feds by reeling in a bigger fish. Meanwhile, Internal Affairs officer Verco applies pressure to each member of the crew to discover what really happened to Donnie Pomp.
Wozniak launches an all-out war against Stahl after learning that his target is Wozniak's close friend Julia Ayers, who's running for mayor. In other events, Harlee pursues a case that makes her a target of Wozniak and the FBI; and a new presence at the precinct threatens to uncover the crew's deepest secrets.
In the Season 2 premiere, Harlee takes drastic measures to cover up the murder of her abusive ex, Miguel; and Wozniak makes a deal with Stahl to keep himself and his crew out of jail, but soon discovers Stahl has led him into an impossible trap. In other events, as the crew deals with the fallout from the failed heist, Tess struggles to keep her painful gunshot wound under wraps.