In the fourth installment of the fighting franchise, Boyka is shooting for the big leagues when an accidental death in the ring makes him question everything he stands for. When he finds out the wife of the man he accidentally killed is in trouble, Boyka offers to fight in a series of impossible battles to free her from a life of servitude.

Itso, about 35, drives a special ambulance called a 'corpse-van'. His job is to pick up the bodies of the recently deceased and transport them to the morgue. Itso's assistant is a Gypsy with the nickname 'Buddy'. Mimi, a nice and lovable ward-maid from the morgue likes Itso, but he doesn't really pay much attention to her, because he is in love with Katya, an attractive 40 years old woman. Katya humiliates Itso and uses him, but it doesn't change his feelings for her. Katya turns out to be a mistress of the mafia boss Rocco, who beats her and one of the days - brutally rapes her, which is seen by Itso. Buddy convinces Itso that real men deal with life problems by administering justice themselves. Itso decides to rescue Katya and her 14-year old son Mario from Rocco, and free the world from a villain... This complex story, referring to subconscious, psychology and symbolism, is not only about freeing the world from outside evil, but also freeing a man from his inner demons...