The year is 1664.
"Thomas Chaloner is relieved to be summoned back to London. His master, the Earl of Clarendon, has sent him to Tangier to investigate a case of corruption. Chaloner will be glad to be home, to be reunited with his new wife, but the trivial reason for his recall exasperates him - the theft of material from the construction site of Clarendon's embarrassingly sumptuous new house just north of Piccadilly."