Kojima Hiromichi is the ace batter of the Lycaons - a notoriously weak baseball team that is often ranked at the bottom of the league. Determined to lead the team to victory prior to his retirement, Kojima takes a trip to a training camp in Okinawa, hoping to discover what factors the Lycaons lack.

Here, he happens upon a game dubbed "One Outs" - a gambling derivative of baseball - and is soundly defeated by a blond pitcher named Tokuchi Toua, who is claimed to have never allowed a hit in any of the 499 games he has played.

Kojima realizes that he has found the 'missing factor' and makes a wager with Tokuchi. Little does anyone know that the outcome of this gamble will dictate the fates of the Lycaons and all those connected to the team.