On the planet Terranu, two families have established a research base to look for extraterrestrial life. One day four young friends spot a watery tentacle slither out of the nearby river... and a pair of eyes watching from across the water! Soon the two families meet the planet's natives, but they aren't pleased by the humans' presence. The aliens challenge them to a contest. If the humans win, they can stay on Terranu. But if they lose, they must leave immediately. It's up to the young friends and their special powers to win the contest. Will their families be forced to leave the planet forever? Or will the humans and aliens learn to live together in peace?

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?