Far in the future, Earth's oceans have risen. Coastlines have changed to create new islands far from shore. Even worse, Earth has been invaded by aliens known as the Hunters. They are masters of camouflage and enjoy hunting down humans and other creatures for sport. On the island of Humanhattan, one family is ready to make the dangerous trip to the safety of the government Fortress. But when Rio and his friend, Ani, are separated from their parents, they have to rely on their wits and quick reflexes to avoid the deadly Hunters. Will the two young friends survive until help arrives?