A cargo truck explodes on a busy Martian highway, releasing a deadly biochemical weapon which kills hundreds. The biggest bounty in the history of the solar system is being offered for the one responsible, and four luckless bounty hunters and their Welsh Corgi have a lead. Spike, Jet, Faye, Ed and Ein star in their first theatrical outing, Cowboy Bebop: Knockin' on Heaven's Door, and all of the signature style that made Cowboy Bebop such a hit has followed them to the big screen.