After receiving a message from an unknown planet 3 days in Slipstream away, the crew of the Andromeda take it upon themselves to save the people. The strange thing is that the message is a woman and it is going directly into Dylans head and no-one else can hear it.

As they enter the ice moon of one of the planets, they come upon the Vault of the Heavens. A large palace made of ice. in discovering this the comm is cut and on Dylan's orders, Try destroys an energy cloud above the planet. After discovering that the aliens mean no harm, Dylan finds out that they need the cloud, or the entire species will die!

Will they be able to return the cloud before the time runs out?