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.
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Homepage
Year2021
Number of episodes32
Number of seasons3
Episode run time40,60
StatusReturning Series
GenresRealityMysteryAction & Adventure
Production countriesSouth Korea
