Daigo Kiryu and Utsusemimaru set off in pursuit of Dagded, the Uchu King, who has invaded the Earth. However, in the midst of their battle with Dagded, Utsusemimaru is sent to another Earth in another time and space. He arrives on an Earth that has been invaded by the Deboth, unable to save the universe from Dagded. In order to prevent a devastated future, he heads back to his original time-space, but due to the alteration of time-space, Gira, the new Uchu King, reigns in Chikyu...!