One fateful day, Dai meets a mysterious monster named Goutetsu, a self-proclaimed "god." Seeing the boy's untapped potential, Goutetsu promptly selects Dai as his "oyakata"—a coach who can train Goutetsu in the world of "kamizumo," sumo wrestling matches between gods. The gods are energized by the drumbeats hammered by their oyakata during kamizumo battles, forcing Dai to pick up the mallets once more.