In Gotham City, where heinous acts of violence are a daily occurrence, the GCPD relies on Harley Quinn, a young forensic psychiatrist and profiler, to consult on their toughest cases. But Harley is haunted by one unsolved case the night she discovered her roommate’s body marked with the signature of a notorious serial killer known as The Joker.Five years later, the case remains unsolved and a new series of horrific murders occur throughout the city. As the murders escalate, Harley’s obsession with finding the depraved psychopath responsible leads her down a dangerous path. When the past and the present finally collide, Harley has to decide how far she is willing to go and how many lines she is willing to cross to solve these cases once and for all. 1st Print.