A text message arrives from a dead friend. Since then, mysterious cases take place in a high school, which are intricately tangled with each other. Five mystery club members get together to reveal the truth of the mysterious incident at school.

Cast:Park Ji-yoon, Jang Do-yeon, JAEJAE, BIBI, Choi Ye-na,

Genre:Reality, Mystery, Action & Adventure,

country:South Korea,

Production:CJ ENM,