High School Mystery Club

On the first day of school, five new students are asked by a forgetful teacher to find a password for his laptop.

Pizza that was left in the teacher's office disappears and the suspicion points at the five members. To prove their innocence, they go around and investigate others that were in the teacher's office.

As the five members got the door open after many attempts, they witnessed students bullying a classmate.

As members take the entrance exam for the elite class, they feel troubled by the questions; the first request has been made to them.

The five members find out that all the secrets of this school have something to do with the elite class and hear that someone has cheated on the last entrance exam.

The members find out that there's a clue inside an eraser so they check the footage on the surveillance camera.

The members get kicked out of the cafeteria by a suspicious duty manager who seems to be hiding something.

The members receive an anonymous call and are requested to find a green pill that has to do with the elite class.

Snuck into the elite class, the members find the green pill at one of the desks. They struggle to get to the bottom of the stories behind the green pill.

The request to reveal the truth about In-hye's death has been made many times. While tracking down the evidence, the members receive a horrifying call from a stranger.

The messages that the members sent to In-hye's social media account are shown read, and they begin to search for the mysterious one that is updating In-hye's social media account.

While the members discover the fact that Ae-ri or whoever has Ae-ri's phone is heading to school, a teacher puts them in confusion.

On their last day of school, a clue about the green pill is sent to the members. They find out that the head of the school has something to do with the hidden stories behind the school.

After solving four square puzzles that were written on Mr. Kim's notepad, the members search the basement but end up getting locked up.

A secret place behind the cafeteria is revealed and the members struggle to find their way out of the school.

Snuck in the Advanced Study class, the members overhear the conversation of teachers and find out that they are given one hour to save other students.