A deadly virus has swept the planet and Tandy Miller has searched the country for other survivors, only to find that he is almost certainly the person on Earth. Slowly, other survivors find their way to Tandy, including his eventual wife, Carol. In Season Two, the group relocates to Malibu where Mike Miller, Tandy's astronaut brother, finally finds them after spending years alone in outer space. Then, Malibu appears to be under siege as unknown, seemingly hostile survivors approach the beach.