Joonmyeon is the son of two big shot scam artists. Yi Fan is the only son in a highly respected and feared mafia family. Their parents are best friends, so naturally the two grow up together. What kind of life do these two lead?

The worlds couldn't be split anymore, they needed to become one. Tweleve people will have to stand up to make this happen; but will they be able to survive their heartbreaking lives first?