Jack Till, who has retired from the LAPD after a respected career as a homicide detective, now works as a private investigator, comfortable chasing down routine cases while visiting his 24-year-old daughter, Holly, who has Down Syndrome. But when the parents of a recently murdered young girl, about Holly's age, ask for his help when the police come up empty, Till reluctantly takes the case. When Till is finally able to catch up with the killer, he finds that the man he's after is far more dangerous and volatile than he ever could have imagined. As the body count rises, Till must risk his life to find this seductive and ruthless killer whose murderous spree masks a far deadlier agenda.