During a skirmish with a small patrol of Federation pursuit ships, Orac is badly damaged. There is only one person who can repair the super-computer: Federation Doctor Brynn Pellas.
Avon and Tarrant take Orac to her base, unaware that the planet she lives on is now under the control of the Terra Nostra - and Pellas is in the crime syndicate's back pocket.
Pellas can repair Orac - but first, the Liberator crew must steal a secret Federation weapon for the Terra Nostra. Codename: Zero Point.