This story is about 11 mafia's in South Korea . All are scared of them . 7 of them are first strongest mafia group and other 4 are second strongest group ! 1st & 2nd mafia groups doesn't fight for the 1st place because they are friends from childhood . All are cold but not to each other ! Meanwhile : 11 girls are the choreographers and they have their own channel ! Dance is their life . 7 of them are just like sisters and 4 of them are their best friends . 4 girls work for 2nd strongest mafia group . Only 11 girls knows abt it .