Summoned from an ashram in Tibet, Ace finds himself on a perilous journey into the jungles of Africa to find Shikaka, the missing sacred animal of the friendly Wachati tribe. He must accomplish this before the wedding of the Wachati's Princess to the prince of the warrior Wachootoos. If Ace fails, the result will be a vicious tribal war.
Ba'al travels back in time and prevents the Stargate program from being started. SG-1 must somehow restore history.
SG-1 searches for an ancient weapon which could help them defeat the Ori, and discover it may be in the Ori's own home galaxy. As the Ori prepare to send ships through to the Milky Way to attack Earth, SG-1 travels to the Ori galaxy aboard the Odyssey. The International Oversight committee have their own plans and SG-1 finds themselves in a distant galaxy fighting two powerful enemies.
