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?
I guess this is it.
Creo que es todo.
Acho que é isso.