One outs begins when Hiromichi Kojima, the star batter of the fictional Lycaons in Japan's League, heads to the southern Japanese of Okinawa to train and bring himself out of a slump. There, he meet Tōa Tokuchi, a 134-kmph (83 miles per hour) pitcher and the undisputed king of a gambling form of baseball called "One Out." At Kojima's urging, Tokuchi signs up with the Lycaons under an unusual contract: he gets 5,000,000 yen (about US$46,000) for every out he pitches, but loses 50,000,000 yen (US$460,000) for every point he gives up. Tōa Tokuchi is a professional gambler and a baseball player in one outs game.