1982. It’s the first year of Korea’s Pro-Baseball League. Gam Sa-yong is able to join the team just because the Sammi Superstars don’t have any left-hander pitcher. Unlike its name, Superstars, Sammi is the last place team in the league. Sa-yong never becomes an ace, but throws as a mop-up relief pitcher in losing games. Nobody would expect him to win a game. Then one day, the perfect chance arrives for Sa-yong. It’s a game with the best team in the League, the OB Bears. OB’s ace pitcher Park Cheol-Su is about to win his 20th consecutive game. No other pitcher in Sammi wants to go up against Park’s winning streak. This is the last and the first chance in his life for Sa-yong to be an ace. Just once. Just one game! Will a dream come true for Gam Sa-yong?