A 911 call from a remote area in Brooklyn triggers an investigation that unravels one of New York City's most disturbing murder cases. Police arrive on scene to discover the lifeless body of 24-year-old graduate student Imette St. Guillen. Her face is concealed with packing tape and her arms and legs bound with zip ties. NYPD Homicide Detectives Sean Mc Tighe and Mark Brooks have very little to go on as they search for a sexual predator in the city.