Three people died mysteriously in the boys' dormitory, but another roommate had a perfect alibi. Who was the murderer? "Ah!" The silence of the boys' dormitory building was broken by a scream. A boy ran out in a panic and shouted: "He's dead! He's dead!" Within ten minutes, ambulances and police cars arrived at the scene, and a cordon was set up outside the dormitory door of 2306.
