Pressed by the government to acquire new technologies, SG-1 is led to a world inhabited by a seemingly primative race. When Apophis arrives, SG-1 ambush him with disasterous consequences.

SG-1 discovers a race of attractive people who age extremely rapidly. The situation becomes personal when O'Neill begins to suffer from the same accelerated aging, and must live out the rest of his life on the planet.

A cosmic accident causes SG-1 to be sent back 30 years into Earth's past, where they must locate the Stargate and find a way home.