Baek Je-na is a third-generation conglomerate and a gold spoon of the highest class at Cheongdam International High School. Kim Hye-in grew up in poverty and is offered a chance to study at the Cheongdam International High School in exchange for her silence on a murder she witnessed. Cheongdam International High School is a homicide mystery that follows Je-na’s rivalry with Kim Hye-in as they are pitted against each other in mental warfare.

A fantasy romance drama that goes back and forth between the past and the present through her first love that she lost to suicide on her birthday 10 years ago, and the mysterious photos that he left behind.