Following a plane crash on a school excursion, Oribe Mutsumi and her peers become marooned on an apparently uninhabited island. Utilizing her wilderness expertise, Mutsumi leads the survivors, confident in a swift rescue within three days. Yet, unforeseen challenges arise as the island teems with deadly oversized insects. With her understanding of butterflies, wasps, and more, Mutsumi's survival skills become paramount in ensuring her classmates' safe return home.