Kim Taeyeon.She has a mysterious aura around her.Her parents died when she was only four.Ever since that event,she stopped interacting with people.She's always by herself,playing by herself and talking to herself.Some people even think she's crazy.

Until one day,Tiffany Hwang transferred to the school.Taeyeon changed her way of living.However,because of her past behaviour,everyone in school stopped Taeyeon from meeting Tiffany.They didn't want Taeyeon to so called "infect" Tiffany.

What most people did not know was that Taeyeon is already engaged to Tiffany but the latter couldn't remember because of an accident.Will Taeyeon continue to fight for her fiancee or will someone else get Tiffany before her?