Natsumi Furukawa is an ordinary high school student. She came from a rich family. Her father was the richest architecture in Japan. She was one of the best student in her school. She lived an ordinary Life. Until something unbelievable happened to her. One day a person came upon her and told her that she will die in the next few hours.

Will she really die?
Is that a prank?
Is he telling the truth?
What will happen to her?