Super Space Sheriff Gavan Infinity

Reiji Doki is a member of the Galaxy Federal Police who travels across the multiverse to stop criminals using the power of the Emorgears, accompanied by his partners, researcher Daisuke Date and the autonomous artificial intelligence "AGI". At Multi-Earth Lambda 8018, he faces one of these incidents, transforming into Gavan Infinity to protect the multiverse.

Reiji comes across Setsuna Aikokuin, who can transform into Gavan Bushido. Confused at first because the title of Gavan is exclusive to only one individual in the entire universe, Setsuna attacks Reiji at first, but they eventually join forces to stop the criminal spreading Emorgears across Setsuna's universe.

Reiji and his team's next stop is Multi-Earth Iota 5109, where they assist Kiki Iwai, who can transform into Gavan Luminous and her partner Kotobuki "Koto" Takanari, to arrest an Emorgear criminal intending to take revenge on a mob ruler.

At Multi-Earth Sigma 3302, Reiji meets the investigator Shoko Hanemura and her partner, Mikuro Arimoto, an ant who can transform into Gavan Ameise, joining forces to stop an Emorgear criminal who is sinking buildings with an underground machine.

Reiji returns to Setsuna's universe and learns that his superior officer, Rui Amou, was kidnapped by an Emorgear criminal who uses her as leverage against him, and they join forces again to rescue her.

Reiji and co. assist Kiki and Koto's chase of a child and her mother who used the power of an Emorgear to escape her abusive father, who sent the Phantom Thief Fade after them.

Back to their original universe, Multi-Earth Alpha 0073, Reiji and Daisuke are attacked by Death Gavan, Reiji's predecessor who once was known as Gavan Destiny before he turned traitor. Daisuke is injured and Reiji chases after Death Gavan, challenging him to a duel, which ends once a mysterious explosion of Emorgy ends the fight and Death Gavan flees.

Setsuna realizes that an Emorgear criminal in his universe is an old acquaintance of his and Reiji steps in to help him.

Reiji returns to Kiki and Koto's universe, seeking their help to analyze a missing Emorgear who reappeared and finds the two investigators having a quarrel when a troublesome Emons capable of multiplying itself appears.

Reiji and co. are testing a new equipment for the Cosmo Gavarion when Kunai Kazanami, a ninja who just like Reiji, can travel between dimensions, transforms into Gavan Raiya and attacks them.

Reiji accompanies Kunai back to his universe, Multi-Earth Zeta 2066, where Reiji learns that Kunai's sister Hatsune is held hostage by a powerful criminal organization and used as leverage against him, so they team up to rescue her.

Having learned about an impending crisis threatening the entire multiverse, Kunai starts traveling to the other universes to seek the help of the other Gavans. His first stop is in Setsuna's universe, where Setsuna is distraught with the fact that he can't cry like the other normal beings. He meets Reiji and Kunai and together they face another emorgear criminal.

Kiki is possessed by an alien ghost who seeks to reunite with her beloved and Koto looks for her with Kunai's help.

Tesshin Mikage, also known as Death Gavan reappears and invites Reiji to Makuu Space, where he reveals his true intentions.

Determined to become a Gavan and prove himself, Patran investigates a series of bombing incidents and puts himself in harm's way to protect the city.

Reiji and his team arrive at Multi-Earth Phi 5791 where all mankind had uploaded their minds into the cyberspace and travels the solar system on space railroads, and team up with the Biccringer, a robot who can transform into Gavan Diagram to stop a rogue AI who threatens all humanity. Meanwhile, Kunai is informed by his superior that he is forbidden from keep investigating on Death Gavan.

Kiki and Koto finally captured the Phantom Thief Fade, but as they interrogate him, they and Reiji must deal with a huge meteor en route of collision with their Earth.

Reiji, Rui and Setsuna infiltrate a suspicious matchmaking party to investigate. In the occasion, Setsuna reminisces about a special person from his past.

Kiki is severely injured in action and Koto herself transforms into Gavan Luminous to fight in her place. Meanwhile, Reiji attempts to get to their universe to help but is trapped in Makuu Space instead where he meets Mikage again.