The Challenge (1982)

Haunted by past failures, Rick, an American boxer adrift in life, accepts a seemingly simple assignment: deliver an ancient sword to Japan. Unbeknownst to him, he is a pawn in a ruthless game of sibling rivalry, a clash between the way of the samurai and modern ambition. Entrusted by one brother to train with the other, Rick finds himself drawn into the heart of their conflict, swayed by honor and tradition. His loyalties are further complicated by a passionate connection with the samurai's daughter, forcing him to choose a side in a battle where love and vengeance intertwine. His journey will forever alter his destiny.