John is sucked into a wormhole whilst floating outside Moya, and finds himself on a strange iceberg at its centre. There he is faced by an eyeless man in black, who attempts to kill him. Backing away, John finds himself transported back to the day he arrived on Moya.

Just as D'Argo tongues him into unconsciousness, he is dragged back to the iceberg, where the man in black reveals himself to be an Ancient. As faces from John's past flash by, the man explains that John's possession of wormhole knowledge makes him a danger to the Ancients, especially as more aggressive species are now chasing him in search of the wormhole secrets.

John then finds himself transported to a burning Moya, where Aeryn has somehow become Chiana. Returning to the iceberg, strands of Aeryn-Chiana's hair still in his hand convince him that what he experienced was not an illusion. The Ancient explains that there are many 'unrealized realities' out there, connected by wormholes.

After another jump back to the past, the Ancient warns John that if he should re-enter normal space at a time earlier than he left, he could dramatically change history as he knows it. To underline this, John then finds himself transported to a world where he is working for the Peacekeepers.

As the iceberg-universe collapses around them, the Ancient tells John he must find his own way back to Moya - but must be very careful. Two quick, desperate jaunts to a Scarran-dominated Earth and a mixed-up Moya on which all her crew have changed species and John is a Peacekeeper plant convince him of the need for caution. Finally, he leaps down the wormhole, knowing that whereever he lands may become the permanent reality.

Exiting the wormhole, John calls for Pilot, but there is no answer. Looking around, he sees why: Earth is spinning below him.