"Detectives Byrne and Balzano return to the streets of Philadelphia to put an end to a macabre succession of murdered children. A quiet Philadelphia suburb. A woman cycles past a train depot with her young daughter. There she finds a murdered girl posed on a newly painted bench. Beside her is a formal invitation to a tea dance in a week's time. Seven days later, two more young victims are discovered in an abandoned house, posed on painted swings....