Bai Zhan, the leader of the idol group TREE, finds himself switching body with an unknown girl overnight! What's worse, he finds that girl is his hater as well as the most devoted fan of his group member, Ji Shan. She takes possession of Bai Zhan's body and even moves into the group's apartment! It seems that this stupid and stubborn girl really appreciates this destined chance to stay with her idol and she refuses to cooperate to find the way to switch their bodies back!!! GEE!!! Now, Bai Zhan comes up with a wonderful idea... If I make her my devoted fan, then everything will go as I want!