Exploring a strange and beautiful garden, SG-1 comes across a dome containing a race that are connected to machines. The team are captured by the machines and rendered unconscious, but awake to find themselves reliving pivotal moments of their lives, over and over again. Then they discover it is virtual reality and a mysterious keeper appears to persuade them to try different outcomes for the moments. But can the team escape his clutches, when they don't know what is real and what is not?

Stargate Command is approached by representatives of Jonas Quinn's home planet seeking military hardware. Their world is divided into three territories and there is a long history of war among them. Jonas' country fears that the other two territories are about to sign a non-aggression pact thus making them vulnerable to attack. In return for arms, they are offering an abundance of Naquadria. SGC isn't about to get involved in what amounts to a civil war but there's another possible outcome when Jonas' one-time professor, Doctor Kieran, tells them of an underground movement ready to overthrow the government and seek out a lasting peace. SG-1 travels to Jonas Quinn's home planet to obtain information on the situation there but not all is as it seems.

Anubis's super weapon has been put out of commission, but Yu's fleet has been diverted to the other side of the galaxy by Yu himself, allowing Anubis to escape into hyperspace. Jonas has been captured by Anubis and Daniel is still aboard Anubis's ship, evading capture. Anubis uses the mind probe on Jonas, learns of Naquadria, and begins his attack on Kelowna. The Kelownans seek aid from the SGC. Jack and Sam arrive on Langara to discover that the Kelownans have given Anubis Naquadria in order to secure their safety. They communicate with Daniel who is attempting to free Jonas. Teal'c has convinced Yu's first prime to seek a new leader of the System Lords, Ba'al.

Jonas Quinn returns to the SGC to ask for assistance in saving his nation. He explains that the Naquadria was originally Naquadah and a Goa'uld named Thanos started a chain reaction to transform all of his planet's Naquadah into Naquadria. A large vein of Naquadah has just been affected and the Kelownan scientists believe that the transformation will cause this large a deposit to explode, taking their entire nation with it.