You have started living independently since the age of 10 because your parents mysteriously left. Your aunt only sent you money to buy your necessities, at that time you still couldn't believe that you were really left alone. You were bullied to the point of trauma and mental decline, which made your aunt worried. As you grow older, you start to wonder where your parents have gone. those thoughts keep filling your mind until you start getting sick often due to decreased immunity .... Your father and mother have planned this for a long time. they know you have to be independent with a lot of pressure and coercion. Father, Jeong San Woo is the leader of a dark organization that not many people know about. while your mother... no one knows where she is and how she is doing