Koto Shiya, who was highly regarded as an ace striker in high school soccer, learns about the existence of Muay Thai while traveling to Thailand for a friendly match, and encounters "Garuda,'' a Muay Thai fighter known locally as "God.''

Garuda easily kicks a soccer ball and shows overwhelming strength even in the ring, but Toshiya recognizes Garuda's strength and wants to fight, so he drops out of high school and pursues the glory he had built up until then. He gave up and switched to kickboxing.

Together with Otone, a karate master who once fought Garuda and lost his leg, "Overthrow!" Toshiya aims to become 'Garuda', but that is the beginning of a bloody battle.