 The Liberator is damaged in the battle against the alien invasion fleet of Andromeda and the crew abandons ship whilst the automatic repair system on-board repairs the ship. Avon finds himself on the tribal planet Sarren, where he is rescued by Dayna and her father, Federation fugitive Hal Mellanby, only to find Serverlan, the newly-elected president has too arrived on Sarran. Returning to the Liberator, Avon and Dayna finds The Liberator has been taken over by a Federation death squad led by Captain Del Tarrant. After they find and rescue Cally and Vila from a hospital that is in reality a slaughterhouse, Avon, Vila and Cally investigate a derelict spacecraft, only to have all hell break loose when Cally is under the influence of a alien woman that assumes her appearance and requires the crew to transport her back to her home planet.