Jung Taekwoon also called Leo is a 17 year old high school student with super powers which he uses to steal and blackmail people even though he just wants to live a normal life. His father, a retired super villain doesn't allow that and forces Leo to be a villain. But what happens when he meets the children of the heroes that his father killed? When he falls in love with the daughter and has to fight the son? They not knowing his identity and he not knowing their