As Shinsei Inazuma Japan was about to have a match with Inazuma Legend Japan, a mysterious attack of a person and a swarm of robots interrupted, and another mysterious girl's power drove the world into another dimension. As the world of Inazuma Eleven Go and Danball Senki W met, the two teams must work together to find out what happened to their worlds.

In a futuristic Tokyo, several policewomen fight a monster. One of them, Katsumi Liqueur, remembers where she saw it before... Katsumi Liqueur, an American-born woman of Japanese descent, travels to Tokyo to visit her mother, Fuyuka, who is sick in the hospital. She takes a shortcut through an alley after her taxi gets stuck in traffic, only to encounter a monster and two policewomen fighting it. Later, she meets their chief, Rally Cheyenne, who, it seems, has been expecting her, though Katsumi has never met her before. The policewomen want Katsumi to help them fight the monster, but Katsumi, who does not want to believe in magic, resists.

An adventurous wild mouse called Gamba travels with his friends to see the ocean but he finds an injured mouse and hears about the violence of white ferret Noroi. Gamba decides to help the mice suffering under Noroi's tyranny.