In the second season of Brother for Brother, police captain Igor Svetlov continues in his persistent struggle against the criminal world in the district of Harlem. Kravchuk, now suspended from the police force, decides to go into business working undercover for his brother Ivan Antonov, an influential person in the local town. Svetlov has good reason to count Kravchuk as a dangerous enemy as their personal vendetta goes back a long way. Igor still holds him responsible for Lena's death, strongly suspecting Kravchuk of ordering the hit on him, which resulted in the tragic killing of Lena by a bullet that was meant for him. Meanwhile, Kravchuk has discovered that someone has taken a contract out on him, and the man who is rumoured to be doing the job is Kid, an assassin with a flawless record. When the police discover who is responsible for organising the hit, Antonov orders Svetlov to find Kid before it's too late. Thus Svetlov finds himself with no choice but to protect his deadliest enemy.