AD 171 Banna Fort, Hadrian's Wall Centurion Aurelius Petrus reluctantly joins the secretive cult of Mithras. Drawn deeper into its initiation ceremonies, Petrus must navigate the politics of the cult as well as their clandestine rituals. When the body of a man is found, Petrus is charged with the investigation.

AD 171 Banna Fort, Hadrian's Wall Centurion Aurelius Petrus reluctantly joins the secretive cult of Mithras. Drawn deeper into its initiation ceremonies, Petrus must navigate the politics of the cult as well as their clandestine rituals. When the body of a man is found, Petrus is charged with the investigation.