Marcus Didius Falco discovers that rank brings problems, the most gruesome of which is a corpse buried under the tiles of his new bath house. The contractors have fled to Britain where, as the Fates have it, Falco is ordered. A local chief and ally of the Romans is having a Palace built by the Emperor Vespasian. However, the project is running late, and fatal accidents keep happening. Falco, troubleshooting for the Emperor, is without an ally and now next on the list for assassination.