A psychological thriller of a grieving mother turned cold-blooded avenger with a twisty master plan to pay back those who were responsible for her daughter's death.

Keisuke Miyahara oversleeps on the day of his entrance exam for Tokyo University. To postpone the exam starting time, Keisuke Miyahara sends an email to the school warning of a bomb. His plan works and he is able to take his exam and passes. On the day of his entrance ceremony, a man named Hiroshi Tanaka appears in front of Keisuke Miyahara and threatens him.