Taking place in an alternate timeline after Raimon Junior High wins the Football Frontier, a group of boys is playing soccer on a remote island off the coast of Japan. However, one day the students witness the demolition of the only soccer field on the island as they fight desperately to prevent its destruction, to no avail. The only way to regain their soccer club is to become champions of the Football Frontier. Asuto Inamori and his classmates take up the offer, moving to mainland Japan and attending Raimon Junior High. Leaving behind their families and entering metropolitan Tokyo, they embark on a journey that will test their resolve to be the best in all of Japan. Inazuma Eleven: Ares no Tenbin tells the tale of a group of friends whose desire for soccer burns brighter by the day. Through their encounters with several titans of the soccer landscape, including the mysterious coach Zhao Jinyun—they rush headlong into the Football Frontier to face the greatest teams Japan has to offer!

While other schools in Japan compete for the title of being the best soccer team in the country, Raimon Middle School's soccer club, Inazuma Eleven, struggles to rise from the verge of being disbanded. The grandson of Inazuma Eleven's first generation goalkeeper and captain of the team, Mamoru Endou, takes the challenge of kicking the long neglected club back into shape. To do this, he'll need a little help and more than a little luck. Mamoru Endou finds hope in the hands of Shuuya Gouenji, a brilliant young player who has given up on soccer. Mamoru is determined to get Shuuya and other new recruits to join his team, no matter what the cost. Is his passion and determination enough to treat the ailing club? Or is there no more hope for the team?

The moment of reckoning has arrived as the illustrious Football Frontier International is finally underway. After winning the national Football Frontier, the newly assembled Raimon Junior High School soccer team awaits the announcement of Inazuma Japan—the team of players who will represent Japan at the international tournament. Asuto Inamori, along with the Demon of the Field Ryouhei Haizaki and the Emperor of the Pitch Yuuma Nosaka, quickly realize that they are up against forces far greater and more powerful than they anticipated. In Inazuma Eleven: Orion no Kokuin, mysterious powers are at play within the tournament that threatens to alter the course of history and the game of soccer itself. With the help of their cunning coach Zhao Jinyun and the inexplicable newcomer Ichihoshi Mitsuru, Inazuma Japan must defend the world of soccer in their most difficult challenge yet.

Tenma Matsukaze is a new student at Raimon Junior High. Due to his love for soccer, he decides to join the school soccer team, which gained its reputation after the amazing performance shown ten years earlier in the Football Frontier International, a tournament that hosts the best youth teams the world has to offer. Unfortunately, the once renowned school doesn't have the soccer spirit it once enjoyed. This is primarily due to the fact that soccer in Japan is now controlled by a dark entity known as the Fifth Sector. They alone decide the fate of every match, instructing teams to either win or lose. The actions of the Fifth Sector have beaten down the country’s soccer teams, who no longer have a love for the game. Tenma and his teammates will look to shift this paradigm and fight back against their evil oppressors. Thankfully, they will not be alone in this battle, as they will get help from a group known as the Resistance. Cheer on the boys of Inazuma Eleven Go as they fight the good fight!