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.

Within hours of his return, Chaloner considers these thefts even more paltry as he is thrust into extra investigations involving threats of assassination, a stolen corpse and a scheme to frame the Queen for treason. Yet there are connections from them all which thread through the unfinished Clarendon House...