Yama Ishimoto, a cynical high school student in 2018 Japan, would like nothing more than to keep his life free of school drama and hard choices. However, he’s forced to face his circumstances when an eccentric detective blazes into his life, alerting him of a string of brutal murders at his school.

Now, as Yama furthers this investigation, he must dig through the secrets of the city, bringing him and his friends closer and closer to danger in the process. Every step leads Yama to the most unexpected - and terrifying - culprit…