After a wild pitch that completely misses the batter, Eijun Sawamura loses his final middle school baseball game. Disappointed by this loss, Eijun and his teammates promise to reach the national tournament once they enter high school. But everything shifts when a scout unexpectedly invites him to Tokyo's prestigious Seidou High School, having spotted potential in his unconventional pitching style. Supported by his teammates, Eijun accepts the invitation, prepared to refine his abilities and compete at a much higher level of baseball. However, now surrounded by many skilled players, Eijun finds it hard to secure his spot on the team. He declares that he will eventually become the team's ace, provided that fellow first-year Satoru Furuya does not claim the title first with his lightning-fast fastballs, which have already earned him a coveted place on the starting roster. With these talented newcomers joining an already strong lineup, the Seidou baseball team aims to become the best in Japan, confronting numerous formidable opponents that stand in their path.