An ancient vase is unearthed during a school excavation class. Under the guidance of their homeroom teacher, Mr. Kajikawa, Yuri, Toshiko, Marumi and other classmates in Class 3C begin to investigate the mysterious vase, but in the process, strange phenomena occur one after another. Students from Class C who touch the vase during the excavation are killed one after another. The police begin an investigation into the crime as a random attack by a pervert, but Yuri deduces that an evil spirit sealed inside the vase may be causing the crimes. The key to solving the mystery lies in the ancient tomb where the vase was excavated, but...! A shocking mystery/psycho-horror story by Taniman Yumi!