In Gideon the Cutpurse an accident with an anti-gravity machine catapulted Peter Schock & Kate Dyer back to 1763. Now a bungled rescue attempt leaves Peter stranded in the 18th century whilst a terrifying villain The Tar Man takes his place & explodes onto 21st century London. Concerned about the potentially catastrophic effects of time travel the NASA scientists responsible for the situation question whether it is right to rescue Peter. Kate decides to take matters into her own hands. But things dont go as planned & soon the physical effects of time travel begin to have a disturbing effect on Kate. Meanwhile in our century The Tar Man wreaks havoc in a city whose police force are powerless to stop him...