Manami helps out at her family's beauty salon and runs the unsuccessful "50% Theater Company." One night, after missing a call from Nao, her sister, Manami later discovers that Nao died that very night. After getting into a conflict with her mother, Manami and a friend set out for Tokyo in order to collect Nao's things. There, through encounters and reunions with various people, Manami finally comes to face with herself.
Dead bodies with eyeballs ruptured are continuously found. Their direct causes of death are heart attacks and they acted like they were possessed right before their deaths. Mizuki is a university student. Her friend dies in front of her. Meanwhile, Haruo’s younger brother dies. Mizuki and Haruo begin to investigate together. They learn that Eiko holds a key to the mystery. Soon, Eiko's eyeballs rupture and she dies by a heart attack. Before she dies, she mentions the word "Shirai-san.”