Since joining the police force, rookie patrol officer Emily Thompson has had one ambition: to work homicide. Now she’s got her chance. A twisted sociopath is turning her safe Chicago suburb into a brutal killing field, and every single one of his grisly clues leads directly to Emily. In 72 hours, on her 40^th birthday, he intends to make her his greatest trophy. If she doesn’t stop him before then, Emily’s first murder case will be her last.