In season 2, the Kinsellas are thriving in the wake of rival gang leader Eamon Cunningham's death. However, a new threat rears its head when members of a Turkish cartel inform the Kinsellas that Eamon owed them sizable debt – and since the Kinsellas killed Eamon, the debt is now theirs to pay back.

A boy is killed and his family embark on a gangland war with an international cartel - a war that is impossible to win. But the Kinsellas have something the cartel does not: the unbreakable bonds of blood and family.