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?
This was the only way I could 
protect everyone from your attack.
Era la única forma en que podía proteger a todos de tu ataque.
Só assim que poderia proteger 
todos contra o seu ataque.