Balzano and Byrne

A devious serial killer lays siege to the city of Philadelphia, brutally sacrificing pretty young Catholic girls on the altar of insanity. As the body count rises, an exceptional investigating partnership struggles to stop him. Detective Jessica Balzano, Philly's Homicide Unit's newest rookie, is teamed up with veteran cop Kevin Byrne, respected for his solve rate and known for his unorthodox methods.

It is the steaming heart of summer in the City of Brotherly Love. Back on the force after taking a bullet during the arrest of a sadistic murderer, Detective Kevin Byrne warily returns to police headquarters. He cannot shake the memory of the Rosary Killer's innocent victims or his growing sense that the evil has not been vanquished. And when he and his partner, Detective Jessica Balzano, are called in on a bizarre case, Byrne's gravest suspicions are confirmed.

On a frigid December night, Karen sits at the edge of Philadelphia's Schuylkill River, dressed in a flowing gown, like a visitor from the distant past. A beautiful and shining young woman, she gazes up at a bone-white winter moon like a fairytale princess. At first glance, one might not even notice that she is dead, coated in a patina of ice. Homicide cops Kevin Byrne and Jessica Balzano take the lead on the case, uncovering a plethora of eerie clues, each more warped and spine-chilling than the last.

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.

Fall in Philadelphia. A man's corpse is found in one of the city's poorest neighborhoods. It's unmistakably the work of a killer. But to homicide detectives Kevin Byrne and Jessica Balzano, it feels familiar. Eight years ago another body was found in the same place, in the same position...killed in the same manner. Even the crime-scene photos are identical. That case was never closed. And now more copycat murders are happening. Someone is recreating the city's most infamous unsolved killings, victim by victim - with more clues for Byrne and Balzano to unravel.

In the heart of Philadelphia's badlands, homicide detectives Byrne and Balzano are called out to a particularly chilling crime scene. Once the pillar of the neighborhood, an abandoned church has become a killing room. At first it looks like a random act of violence. But then a second body is found, and a third. Each crime scene more disturbing than the last, each murder more brutal. And it soon becomes horrifyingly clear that a cold, calculating, and terrifyingly precise mind is at work.

Destroyed by fire years ago, the infamous Philadelphia State Hospital was known as a warehouse for the criminally insane. But one man never left. By night Luther walks Philadelphia's backstreets, drawing to him the mad, the corrupt, the fallen. By day he roams the catacombs beneath the city, killing his prey. Detectives Kevin Byrne and Jessica Balzano are called to a bizarre murder scene: a man has been killed by a railroad spike driven into his head and left sitting on a bench in a local park.

The Farren family has been a plague upon Philadelphia's most dangerous neighbourhood, the Devil's Pocket, for generations. There, row after row of tumbledown houses hide dark secrets - none darker than Billy, the youngest Farren. Afflicted by a syndrome that means he can't recognise faces, Billy must use photographs to identify his family - and his victims. And when your life has bled away, he takes a final, gruesome picture for his wall.