Alexander Grady, a widower and father from Portland, Oregon is chosen to represent the United States of America in an international martial arts tournament against Team Korea. Once a rising star in the martial arts world, he suffered a shoulder injury that forced him into retirement. Also chosen for the team are Tommy Lee, a highly skilled martial arts instructor from Fresno, California; Travis Brickley, an extremely brash fighter with a short fuse from Miami, Florida; Virgil Keller, a devout Buddhist from Providence, Rhode Island; and Sonny Grasso, a streetwise fighter from Detroit, Michigan. Despite being coached by veteran trainer Frank Couzo, their chances of winning are virtually non-existent, as the Koreans train all year long, enjoy lucrative financial support from their nation, and have—on at least one occasion—killed a competitor in the ring. To win, they will need to be the best technically, physically, and mentally. As training begins, the team struggles to bond as Travis antagonizes them. Given the pressure, the American team hires a second assistant coach, Catherine Wade, whose spiritual approach to training clashes with Couzo’s more rigorous coaching techniques.