USSR-China border, 1973: Young soldier Rafael is on guard duty when the border falls under attack from flying Chinese kung fu warriors, leaving him as the sole survivor. Utterly fascinated by the long-haired martial artists who easily dispatched his fellow guards, all while blasting forbidden Black Sabbath music from their portable radio, Rafael is struck by a revelation: he too wants to become a kung fu warrior. Looking for mentorship but with limited options, faith leads Rafael to seek martial arts teachers at the most unlikely of places: the local Eastern Orthodox monastery, where the black-clad monks begin his training. With a skeptical mother, a rival monk, and a budding love interest pulling him in different directions, Rafael finds that his journey to unlock the greatest martial art of all the almighty power of humility is long, winding, and full of kick-ass adventures.