Kyle Roth is a studying archaeologist who is whisked away from the Isle of Crete by two children. Now, on a planet with two women and two kids, he must help them take two small keys to a distant city. Dealing with a bickering brother and sister, a society that deems him an outcast, a giant robot enforcer, and a city in the sky are the least of his problems. The real problem lies on Earth, where the culmination of the origins of the keys has come to bear, and he may already be too late.