A small time gang boss, Namhae coincidentally meets a young talented Go player Minsu, who wasting his days as a gambler. Namhae persuades him to be his private tutor. While he is learning Go and spending some peaceful time with Minsu, suddenly allows himself to reflect on his life, Minsu discovers the shady underworld of his student. But when his competitor wants to expand its territory, Namhae forced into a path of destruction.