Set in Rome between 27 May and 7 June AD 74, the novel stars Marcus Didius Falco, informer and imperial agent.

Beset by his own family troubles, his new responsibilities as Procurator of the Sacred Poultry, and the continuing search for a new partner, he decides to send her home.

Gaia Laelia comes from a pre-eminent Roman family with a long history of key religious positions.

In an attempt to restart his political career – stalled by his younger brother's elopement with his wealthy fiancee – he tries to gain election to the Arval Brethren.

Unable to bring in the Vigiles, Falco is forced to search the house of Gaia Laelia alone, aware that time is running out for finding her before the lottery takes place, or even alive.