In first century A.D. Rome, Marcus Didius Falco works as a private "informer," ferreting out hidden truths and bringing villains to ground. But even informers take vacations, so in A.D. 77, Falco and his wife Helena Justina travel to Alexandria, Egypt. Before long the Librarian of the great library is found dead and Falco quickly finds himself on the trail of dodgy doings, malfeasance, and the lowest of the low-book thieves! As the bodies pile up, it's up to Falco to untangle this horrible mess and restore order.