Wang Jiani, a short, fat and "ugly" girl, has always been ashamed of herself because of her appearance, but unexpectedly met Mongoli, a young man from a well-known family, at the aquarium. At that time, Mongolli was playing cosplay, but Wang Jiani liked the Turtle Immortal and rejected the handsome young man from a noble family. Wang Jiani is surrounded by two best friends, one is Zhi Bi'er, an orthodox civil servant, and the other is Cheng Li, a bourgeois girl who works in advertising design. However, Zhi Bi'er has fallen in love with the son of an aristocratic family.
In order to win Wang Jiani's heart, Mongolli played the role of the turtle fairy that Wang Jiani liked. Can he win the return of the "ugly girl" wearing a mask? Can best friend Zhi Bier win over Mongolli?