Five high school students from wealthy families formed a detective team on campus called "Lohas" with the consent of the principal. In order to obtain spiritual satisfaction and also to help people solve problems. One day, a girl asked "Lohas" for help: a "black cross" appeared on the wall of the dormitory where she stayed, and then her roommates "disappeared" one after another. Not only that, the same situation also occurred in other girls' dormitories, and there was a panic in the girls' dormitory... The five people decided to take over the case and work hard to solve it. Little did they know how much danger there would be behind it, and panic events were waiting for them...