Chae-ho is the toughest gangster in prison. His authority is unquestionable. Everyone respects Chae-ho and fulfills even his slightest whims. Outside, the gangster has a cushy position waiting for him in a gang, where he intends to seize power without much trouble right after getting out of prison. One day, a new inmate appears in the prison — young, bold, and defiant. Chae‑ho takes him under his wing and plans to recruit him into the gang after he serves his sentence.