Interpol detective Horace Milton lands at Fiumicino as a favor to an old friend, but immediately finds himself plunged into a Roman nightmare.
In the evocative setting of Porto di Traiano, the waters yield a body dressed like an ancient Vestal. Flanked by Virgilio, a fast-talking taxi driver, and Livia, an archaeologist with immense knowledge, Horace must decide whether to go home or listen to the call of a crime that seems rooted in history itself.