When the deputy commander of Rome's Imperial Security Service is assassinated on the island of Rhodes, Cassius Corbulo swiftly finds himself embroiled in the investigation. Assisted once more by ex-gladiator bodyguard Indavara and servant Simo, his search for the truth is complicated by the involvement of the dead man's headstrong daughter, Annia. Braving hostile seas, Cassius and his allies follow the assassin's trail south aboard a ship captained...