During an excavation of medieval soldiers from the Crusades, archaeologist Gillian Magwilde and her team find themselves in mortal danger as their discoveries lead them to search for the True Cross. Meanwhile fanatical right wing Christian, Edward Laygass, stands in their way, buying the land where the excavation is taking place and declaring it Holy Ground.

Gillian's ex-lover and archeologist from Iraq comes to Bath to repossess some Iraqi relics which were stolen.