A large group of students are left waiting for rescue after the island their school is on gets hit by a tsunami. After a month with no sign of rescue, they are forced to plan their own way of surviving and escape. Weird things begin happening and all hell breaks loose between the survivors as they begin to lose hope of ever going home.
Each main characters backstory is shown, showing how they became the people they are now with no adults around. Most show a broad range of emotions and regret for things they've done wrong.