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.

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.