Akira and his classmates are on a plane heading back home after a school trip abroad. Suddenly the plane crashes on a mysterious island - Akira is somehow still alive despite the crash, yet he soon finds that he's not really safe. Enormous beasts are chasing after him - beasts which are supposed to be extinct! Akira begins to find other classmates who have also survived the crash. Some begin to work together to figure out how to survive on the island, while others start working against each other.