Taichi is a high school drop out hoping to be a pro boxer when a road accident leaves him paralysed from the waist down. During a long stay in hospital and an even longer convalescence, he wallows first in thoughts of suicide, then in aggressive and self-destructive behavior. Things begin to look up when he's mistaken by racketeers for the attempted rescuer of a rape victim: he's offered a job, meets a great woman and gets accepted as a pupil by a master of aiki-jujutsu, the martial art which channels aggression back to the aggressor, who takes him on because he's intrigued by the challenge of teaching someone confined to a wheelchair.
Very uplifting picture which never depresses the viewer. If you've seen The Karate Kid (and who hasn't) you'll love the martial arts tournament where our hero fights a thuggish karate master who wants to kill him.