Hristo Petkov

At the height of the refugee crisis in Bulgaria, a competent DANS employee and an ambitious local investigator are investigating the murder of a retired police officer in the border town of Smolyan. The clues are gradually turning them into a terrible secret about a crime that will overturn their investigation and personal fate.

An ex-special forces operative wages a one man war through the streets of Amsterdam to rescue his friend's daughter from the local crime syndicate.

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.