It's all-out war between cops and family, as the Donovans band together to save one of their own. Running out of options, Mac faces a difficult decision.
Ray settles his final scores and revisits the past with his father. The Donovans clean up their mess. Smitty gets a crash course in what it means to be a part of the family.
When one of the police officers' heads turns up and the Donovans are implicated in the murder, Ray finds his work with his therapist threatening to unravel.
Ray must find a new way to get Detective Perry off his trail while reckoning with a personal loss. When Bunchy's pharmacy is under attack, he takes matters into his own hands and is catapulted into the public spotlight.
Ray gets closer with Molly Sullivan when he realizes their family connection. Claudette comes to New York and discovers that Daryll is on Detective Perry's radar. Bunchy tries to leverage his heroism for a pay raise.
Mayor Feratti ups the ante in his negotiations with the Sullivans, and Ray must step in to finish the deal. Bridget and Smitty are called in to fix Jonathan Walker Hanson's unsavory publicity scandal.
After Feratti's display of force, Ray and Terry travel to Coney Island to track down Ray's missing car. Mickey, Daryll, and Sandy continue their quest for the truth about the 1977 heist. Smitty seeks revenge on Adam Rain.
Things heat up between Molly and Ray, but their families get in the way when Bridget, Bunchy, and Jim Sullivan all need Ray to fix their problems. Terry and Smitty help Ray with detective work and Ray struggles to stay on Mickey's trail.
Mickey finally learns the truth about the botched heist, and he's out to get his fair share of the money. Ray reflects on his early memories of Jim Sullivan while he and Molly track down Sandy and Mickey by any means necessary.