An old crime comes back to haunt mob boss Vito Rizzuto.

After returning from prison, Vito invites Declan back and declares war on everyone.

Declan learns filling in for the boss is harder than he thought.

The family gets Nico Jr. to relent in his quest to fill his father´s place, but the Rizzuto´s enemies still keep coming after them.

Vito and Declan set out to clear the board of its enemies.

Nats and Valentina each deal with the consequences of their actions. Declan's smooth pathway through the ports hits a major snag.

In the wake of a bloody gangland war, Declan assumes sole control of Montreal's drug trade. But new arrivals from Italy complicate matters.

Feeling the squeeze on a debt owed to the cartel, Declan pushes back on his new competitors. Splintering loyalties start to destabilize the status quo.

Teresa and Christian's burgeoning fentanyl business causes major collateral damage for Rose. Valentina's confession comes back to haunt her.

As word of Valentina’s dilemma spreads, tension within the Cosoleto family grows. Teresa and Christian try a new tactic to undermine Declan.

As the bikers make trouble for the Cosoletos, Nellie’s deal with a key witness hits a setback. Indiscretions in his own camp come back to bite Declan.

It seems Vito has emerged the clear winner in the gang wars, but there are still secret enemies lying in wait.

Families don't get touched. At least that used to be the rule. But when the other side breaks it, Declan reciprocates by shattering it completely.

Declan ratchets up the heat on the Cosoletos and continues to pursue Teresa and Christian. The gift Declan promised is delivered to Nellie.