A retired profiler for the FBI, Terry McCaleb, is hired to investigate the death of the woman who recently gave him his new heart. He figures out that what seemed like a random robbery is really the work of a serial killer. McCaleb must find the killer and stop him. The problem is McCaleb is a recent heart transplant who is elderly, tires easily and is unable to drive. McCaleb must find a way past his disabilities and catch the killer.