When investigating a crash on Cephlon, Jenna is captured by savages. While Avon, Vila and Gan stay down to search for her, Blake and Cally are forced to start for the planet Aristos by the survivor they rescued.
Ensor has travelled to the Federation to get help for his father, also called Ensor, who needs new energy cells for his cardiac-support system. Something called Orac is to be used in exchange. However, on the way back to his father with a surgeon, Ensor's ship is rocked by an explosion, orchestrated by Servalan. The ship dives into planet Cephlon, with the crew fleeing via two escape capsules.
The Liberator rushes to help but the crew are hindered by the high radiation levels on the planet surface. Avon, Vila, Gan and Jenna teleport down and manage to locate the capsules, but only Ensor survived.
Once onboard, Ensor begs the crew to fly to the planet Aristo, to help his father. But somehow Jenna has gone missing. Avon, Vila and Gan teleport back to the surface to begin a search. But they are soon left alone, as Ensor hijacks the Liberator and forces the trip to Aristo.
Jenna is finally located, held prisoner by a primitive race of savages. The rescue team manage to get her free, and run to a hidden base on the planet, where they find Meegat - the lone survivor of a race of people who are now held in stasis on a rocket.. She believes Avon to be the Lord, the one who will help launch the rocket and start the species on their way to a new planet.
Back on board the Liberator, Ensor finally dies of his injuries, and Blake and Cally rush back to Cephlon, in time to see the rocket launched. The crew are teleported up, and decide to find out what Orac really is.
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