The high-octane action series Undisputed is back with BOYKA: UNDISPUTED 4. Scott Adkins is Boyka, the most complete fighter in the world, a man looking for his shot to fight for a championship belt. After he accidentally kills an opponent in the ring, Boyka reaches out to the fallen opponent's wife. But when the wife gets kidnapped by a crime kingpin, Boyka must take on a series of dangerous opponents in the ring to keep her from a life of servitude.