The story takes place in a city known as the "Mystery City". Five protagonists with very different personalities temporarily formed a team due to a misunderstanding and became an online "Mystery Detective Team". They were involved in a city disappearance case, and chain cases occurred one after another, constantly uncovering deeper mysteries beneath the surface. As the case progresses, the backgrounds and growth of the team members are gradually revealed, humor and tension alternate, and the truth involves complex human nature and social forces. Each volume focuses on a main mystery, and the big clues throughout finally converge in the last volume. The fate of all the characters is closely connected with the mystery. The last case is entangled with an unexpected ending, and the team can grow and feel relieved.
