Nine years in the future, the Goa'uld have been defeated thanks to an alliance with an advanced alien race. However, Carter finds out that most of the human race has secretly been rendered sterile by Earth's new allies.

A member of another SG team, returning from an alien planet, commits suicide. The rest of his team begins to go into comas, and Daniel, who also visited the planet, attempts suicide. SG-1 must determine the cause before it is too late.