Late one night a woman drives by a stranded motorist who is later revealed to have been murdered. After a series of terrifying events the woman believes she is the killer's next victim.

In 1979 Clive Sinclair, British inventor of the pocket calculator, frustrated by the lack of home investment in his project,the electric car, also opposes former assistant Chris Curry's belief that he can successfully market a micro-chip for a home computer. A parting of the ways sees Curry, in partnership with the Austrian Hermann Hauser and using whizz kid Cambridge students, set up his own, rival firm to Sinclair Radionics, Acorn. Acorn beat Sinclair to a lucrative contract supplying the BBC with machines for a computer series. From here on it is a battle for supremacy to gain the upper hand in the domestic market.

A University professor takes four archaeology students on a field trip to a remote Scottish island. With tensions already present in the group, they unearth clues to an ancient mystery that will threaten their lives.