A katana, one of a pair known as "The Equals", was a heirloom of the Yoshida family, passed down through the generations before being lost during World War II. It was finally tracked down and recovered in California by the youngest son Toshio. Hoping to return its rightful owner, his father Toru, Toshio hires down-on-his luck prize fighter Rick Murphy to smuggle the sword back to Japan.