Aozora Elementary School's baseball club is a weak team with 36 losses and 1 draw, and the violent captain Ganta has turned it into a one-man baseball club that leaves members who don't like it as substitutes. A transfer student with a red bat, Tadashi Ichinoji, joins such a team. Tadashi, who returns the ball from the outfield to the catcher without bounds, is admired by the surrounding club members, but Ganta does not acknowledge it. At that time, Tadashi's mother collapses with a high fever and is hospitalized...!?