In Roman Britain, AD 189, every salve knows his lot in life depends solely on the morals—or lack of morals—of his master. Fortunately for one young Glevum slave, Junio, his owner believes heartily in rewarding years of loyalty and service. Libertus, a former slave turned pavement maker, is to grant Junio his freedom in an elaborate ceremony at the Basilica Law Court where Junio also plans to announce his engagement. But the young couple's happiness is threatened by a terrible omen—the gruesome discovery of a corpse, hastily concealed in a shallow grave. Who is it? And, more importantly, who would go to any lengths to cover up their heinous crime? Determined to solve the mystery before the impending nuptials, Junio joins his mentor Libertus in piecing together an elaborate mosaic of murder.