Gintoki and co have launched in the Galactic Merchant Fleet Robot Kaien to take out Dark Vader.  Having made peace with the Renho, they now fight for their pride as Earthlings and samurai against Dark Vader, who has become one with the Renho home planet.  Will they be able to restore peace to the universe?
Live with your friends without 
having to lie to yourself.
Viva con sus amigos sin tener que mentirse.
Viva com seus amigos sem ter 
que mentir para si mesmo.