A deadly virus is turning the world's population into walking corpses. While the world erupts into chaos around them, Takashi Komuro and his friends frantically search for a way to break free from the living dead.

Fully rested and armed to the teeth, the group looks on as people are eaten alive in the streets below, and learn a valuable lesson: you can't save them all. However, in the zombie apocalypse, there are always exceptions.

After an EMP wave shuts down all electronic equipment in a wide radius, Komuro and his friends must defend the mansion or risk losing everything that matters to them.