In 17th century England, the Doctor and itinerant thespian Richard Mace uncover a plot by a crew of criminal Terileptils to wipe out humanity.

A James-Bond type fiction film about an evil woman's plans to 'hi-jack' the New Town of Cumbernauld. Sponsored by Cumbernauld Development Corporation, this film is an original take on the 'promotional' films produced for Scotland's New Towns during the 1970s.