ON HADRIAN’S SECRET SERVICE: A new emperor is on the throne. In Britain, Gaius Drusus Flaminius, auxiliary tribune of the Ninth Legion, survives an attack by barbarians only to find himself flung into a world of mystery and intrigue when he is seconded to the Roman secret service. Plots and counterplots are brewing. The sinister Caledonian druids are planning something. But also acting suspiciously is the Roman governor, Falco. When he uncovers the truth, Flaminius finds himself outlawed and on the run. Accompanied by a Celtic warrior woman he sets out on an epic journey from the edges of empire to its pulsing heart, followed by a final chase through the secret tunnels beneath Hadrian’s Villa. And disaster strikes when it is least expected…