When a change of heart moves a well-trained hitman to tender his resignation to his employers, no good comes of it for anyone.

A group of friends decides to document their lives as they search for an underground fight club that exists in the dark web. They put everything on the line for money, respect, and friendship.

11-year-old Dong-ku, who is retarded, is the school's water boy until, that is, the school installed a water purifier system. Disappointed, Dong-ku soon learns the school's baseball team needs a water boy and so he decides to join the team.