Ryo has served his sentence, he is free. But unadapted to the outside world, he knows nothing other than to mingle with the underworld. Forced to play the gigolo, he still manages to find happiness in the arm of a young prostitute. But his boss, a powerful mafioso aware of his abilities in martial arts, does everything possible to make him put on the gloves again and get back into the ring... Now free, Ryô tries to survive in another hostile environment, the urban jungle that is Tokyo