Giorgio Bramante, a Roman archaeology professor, was master of the hidden world beneath the earth – until the day he lost his young son, Alessio, to a group of students intent on re-creating a centuries-old ritual to a long-banished god. His rage knew no bounds and, in a frenzy, he beat one of the students to death. Released from prison fourteen years later, Giorgio is bent upon a terrifying revenge on all those he blames for the loss of his son. Inspector Leo Falcone, a member of the original investigating team, is one of his targets. And Nic Costa, watching Falcone move relentlessly into the man’s merciless grip, realizes the answer must lie in solving a cold case that, like the forgotten Alessio Bramante, has long been regarded as dead and buried for good.