A mysterious syndrome turns schoolgirls into homicidal monsters behind numerous atrocities in Japan. However, nothing is what it seems and when Chika Amagi is arrested for the brutal murder of five people, which starts a journey into uncharted and troubled waters!

Satoshi and a group of his friends are on a lengthy boat ride to Kijijima when the world comes to an end – literally. A huge Tsunami wave 500 meters tall overpowers the boat and he finds himself stranded on an island and alone. Meanwhile the rest of the boat has grounded after being dashed upon the shores and soon Satoshi finds them, and sets off a struggle to survive for the passengers and crew of the ship…