A family retreats to the seaside, far from the bustle of Seoul. Their daughter, Dora, suffers from a mysterious illness. Her discovery of love unleashes a force as powerful as it is dangerous, with far-reaching consequences for those around her…

Hee-su hides his love for his best friend—until that friend falls for someone else, and silence starts to hurt.

The high school senior girls discovered a 'Ghost Hide and Seek' tape recorded by their seniors in the broadcasting club. Through the tape, the girls learned about a rumor that if they win in the ghost hide and seek game on the upcoming school anniversary, they can receive a perfect score on the college entrance exam. The girls decided to recruit Min-joo, a second year student from the religious club, as a mercenary and made a decision to participate together in the ghost hide and seek.