The Liberator heads to the Federation controlled planet Albian, where the crew search for Federation officer Space Major Provine whom they believe can lead them to the location of Central Control. They learn the Federation has buried a radioactive bomb on Albian which can wipe out all life on the planet. Avon meets up with enemy Del Grant, brother of Avon's former lover Anna, and tries to disarm the bomb, having to put aside his differences with Grant.
—Daniel Williamson