Toua Tokuchi, a skilled athlete with a penchant for gambling, dominates the game of 'One Outs' on the streets of Okinawa with his strategic mind and a fastball reaching just 134 kmph, securing an impressive 499 victories. Recognizing his talent, veteran player Kojima Hiromichi recruits Toua for the struggling Saikyou Saitama Lycaons, envisioning a path to the championship through Toua's unique pitching style. However, team owner Tsuneo Saikawa views Toua as a financial threat to the team's revenue. To negotiate his value, Toua proposes an unprecedented contract where he earns five million yen for every out but loses fifty million yen for every run. As the high-stakes psychological battles unfold, based on Shinobu Kaitani's manga, known for Liar Game, One Outs delves into whether a gambling pitcher can defy the odds and lead his team to victory in the world of real baseball.