Lord Asano (Min Tanaka) is disgraced after being tricked by an evil Witch (Rinko Kikuchi) into attempting to kill Lord Kira (Tadanodu Asano). He commits seppuku, leaving his samurai as ronin. Years past and Oishi (Hiroyuki Sanada) tracks down a half-breed named Kai (Keanu Reeves), who was sold to the Dutch and forced into slavery aboard a ship where he is looked over by a Foreman (Rick Genest in a brief cameo). Oishi convinces Kai into joining him, his son (Jin Akinishi) and the remaining ronin into avenging their master's death.