Philadelphia police detectives Kevin Byrne and Jessica Balzano are working a new beat: the Special Investigations Unit, aka the cold case squad. Ironic, given that it’s the height of a blazing hot August. But even these hardened homicide veterans are chilled to the bone as a dormant murder case stirs to life–leading Byrne and Balzano into the dark heart of their city, their souls, and a psyche of pure evil.Months before, a teenage runaway’s body was found in the desolate, dangerous North Philly district dubbed the Badlands. Dead runaways were no novelty on these mean streets, but the Caitlin O’Riordan case was different. Her corpse was found in the basement of a rancid tenement apartment, the inexplicable cause of death: drowning. In the end, nothing was solved and the case was closed.Now a confession to the bizarre murder on the police tipline sends Byrne and Balzano rushing to make an arrest. But instead of a killer, they discover a...