This season, Ray attempts to return to the fold of his family and the church in the wake of his confession to Father Romero. But this second chance at redemption is tested when he meets professional boxer Hector Campos and his volatile sister Marisol, who harbor a dangerous secret. In the aftermath of last season’s shootout with the Armenian Mafia, Ray is drawn into the web of Sonia Kovitzky, a wealthy art connoisseur who is determined to use Ray to further her agenda. Meanwhile, Mickey finds himself on the run in Nevada, scheming to exploit local casino owner Little Bill Primm. Newlyweds Bunchy and Teresa struggle to maintain their connection to each other as they prepare for their first child. Following his life-threatening injury, Terry channels his energy into the Fite Club, enlisting the help of Daryll to train a new recruit. And Abby receives shocking medical news that leaves her questioning her role as a wife and mother. A newly independent Bridget provides comfort and support during this tumultuous time as Conor begins to assert his autonomy with disastrous results.
Ray is in recovery mode in the aftermath of the shootout, striving to reconnect with his family and repair his relationship with Bridget. Meanwhile, Bunchy and Teresa face impending parenthood together as Abby receives a medical diagnosis that threatens to upend the Donovan family. Hiding out in Nevada, Mickey plots a heist as Detective Muncie closes in on his trail.
Ray helps Hector handle a person from his past who risks unearthing a secret that could ruin his career. As Bunchy attempts to please a very pregnant Teresa, Abby offers him a lesson in marital compromise. Meanwhile, an act of petty larceny leads to a renewed sense of purpose for Terry - and Detective Muncie uses evidence against the Donovans to force Ray's hand.
An intruder breaks into the Donovan household, forcing the family closer together as Bridget struggles to maintain her independence. In Primm, Mickey schemes to rob a casino with the help of a lounge singer and a man named Ed. Meanwhile, with a baby due at any minute, Bunchy and Teresa navigate their marital woes under lockdown, and Ray visits Belikov in prison to strike a deal.
Looking for leverage to get the Russian mob off his back, Ray pays a visit to a Hollywood power-player and unearths a secret Ezra shared in the past. Lena and an ex-girlfriend take Abby for a night on the town to help her confront her fears over a recent health diagnosis. After returning from Primm to see his new grandchild, Mickey offers his boys a job prospect while trying to assimilate back into the family.
With the Russian mob threatening his family, Ray finds himself on a road trip with Mickey to Primm, in hopes of recovering money stolen from a local casino owner. Bunchy and Bridget take turns looking after baby Maria when Teresa withdraws to her family's house. And Terry gains confidence as a trainer.
Ray finds himself in a holding pattern, waiting to see if Belikov will be released from prison. An art dealer invites Ray to a breast cancer benefit where he encounters some former clients. Teresa spirals into postpartum depression. Meanwhile, Mickey goes to great lengths to convince the DA that he was the one behind the Minassian massacre.
Searching for a way to get Mickey out of prison, Ray turns to an old opponent to secure a bartering chip in the form of a less-than-wholesome family comedy star. A long-buried scandal leads Ray to an unexpected confrontation with a slick Hollywood agent and a former fixer of Ezra's. Meanwhile, without the protection of the Russians, Ray must help Mickey secure his own safety and gain admittance to the secure K6G prison wing.
After a public declaration from Marisol, Hector's rematch with Whittaker is cancelled. However, Ray enlists the help of Lena and Daryll to ensure the match proceeds. Meanwhile, an angry neighbor confronts the Donovans about Conor's reckless behavior. And Teresa's worsening depression causes her family to have her committed to a mental hospital.
When the head of the Russian mob arrives to find out what really happened to Belikov, Sonia and her daughter take refuge at the Donovan's, throwing her and Abby into close quarters. As both Avi and Lena question Ray's loyalty to Sonia, he must decide whether to help her or put the lives of his family and friends in jeopardy. Meanwhile, Mickey returns to Primm - in search of stolen money, Sylvie and vengeance.
Confronted with a crisis involving one of their own, Ray and his team strategize on how to use art from the Kovitzsky gallery as leverage. Meanwhile, after Hector's wife informs him that she and their daughter are moving to escape the incest scandal, he reaches a breaking point and enlists Ray's help in fixing the situation.
Ray's latest attempt to save Avi and square his debts to the mob takes a hit when FBI agent Frank Barnes nabs him before he can pull it off, so Ray must send Mickey to Las Vegas to place a hefty bet on the boxing bout between Hector and Whittaker. Later, in exchange for Federal protection, Barnes offers Ray a chance to turn informant against Dmitri.
Season Finale. Ray, hoping his deal with Hector will be his family's salvation, learns that Sonia has turned over incriminating evidence to FBI agent Frank Barnes. Ray is forced to wear a wire, but decides to play the Russian mob off the FBI, but things take a dangerous turn. Meanwhile, Mickey's attempt to cash in on the big fight leads him to a discovery that could help Ray against both sides.