After the Goa'uld Apophis comes through the Earth Stargate and kidnaps a female airman, Col. Jack O'Neill is recalled to active duty to be sent through the Stargate on a mission to find out what happened to Daniel Jackson and the people of Abydos, as well as find out where this new threat came from. Captain Samantha Carter, the world's foremost expert on the Stargate, is put on his team, much to the annoyance of O'Neill due to his dislike of scientists.

Colonel Jack O'Neill leads SG-1 on its first mission to Apophis' homeworld of Chulka to recover the missing airman and discover who their new enemy is.