A story of two friends who grew up in the same housing complex in Tokyo but drifted apart after 3/11/2011.

A woman comes home late to find that there is someone in her room, waiting for her.

A rampage at a university, the students Yuka and Mai are frozen with fear. At gunpoint, the two perpetrators try to force them to decide which of them must die next. In a moment of distraction, Mai tries to escape but is badly injured by a shot in the back. After the killers have moved on, a student, Hayashi Yuka, comes to the rescue. But even as they try to save Mai together, the killers return. Hayashi is driven to an act of desperation that leaves him with deep wounds.