Rimmer's replacement, Katerina, is determined to guide Lister back to his home planet. But Earth in 2009 is not everything the boys had expected, and Rimmer has no intention of being replaced.

When Lister's busy day of annoying Rimmer was interrupted by the discovery of a dimension-hopping leviathan in the ship's mile-deep water tank, transporting the crew back to Earth, all Lister's dreams appear to be coming true.