313 AD. Under the rule of Emperor Constantine; Rome finally appears to be emerging from its turbulent past. In order to consolidate his control and under the guidance of his mother Helena; Constantine plans to harness the power of the increasingly influential Christian Church. But his loyalties are brought into question when three courtesans from the Guild of Aphrodite - a guild Constantine himself frequents - are found dead. All three bodies have crosses etched on their foreheads and each cheek. Aiming to protect her son's future; Helena calls upon the service of an 'agente in rebus politicis' - or spy. Claudia is the niece of a tavern-owner and is placed as a wine-server in Constantine's household. But Claudia has secret motives of her own...