After escaping on a lifeboat to a larger island, Oribe Mutsumi and her classmates are once again stranded after it becomes apparent that the island is also populated by gigantic killer insects. Mutsumi and her classmates find native survivors and, with Mutsumi's knowledge of the wilderness, help them. She expects to contact the outside world with the working landlines, though she did not account for all the new bugs. Her knowledge of dragonflies, beetles, and more may be the only thing that will help everyone survive!