When a flying saucer crashes in the Mojave Desert, its inhabitants turn out to be alien slaves, bred to be super intelligent and strong, as well as controllable by their Overseers. These Tenctonese, or "Newcomers", have been assimilated into the population of Los Angeles. One of them, George Francisco, is a police detective with a human partner, Matthew Sikes. George and Matt fight crime together, while learning to respect the other's culture, and question his own. They also fight prejudice as personified by the Purists, and fear, in the form of the unseen Overseers, who seek to regain control over their slaves.