Following a plane crash on an uninhabited island during a school excursion, Oribe Mutsumi and her peers find themselves in a dire situation. Utilizing her survival skills, Mutsumi leads the group as they hope for a swift rescue within three days. Little did they anticipate the perilous presence of massive deadly insects on the island. With her expertise in butterflies, wasps, and other creatures, Mutsumi becomes their best chance at surviving the hostile environment until help arrives.