The Lion is a formidable assassin - clever, skilled, and cruel. In Albuquerque, he forces police detective Tom Armstrong into a tailspin of grief. Several years later, Armstrong's living alone in Mexico when the FBI seeks him out to help: they may have a lead on the Lion. Back in Albuquerque it seems that the Lion has unfinished business, and while he pursues his unknown objectives, he also stays one deadly step ahead of the police and the FBI. For Armstrong it's personal. Can he return to the states and find the arch villain, or is he walking back into more pain and loss?

The paranoid registrant administrator of the Department of Public Safety Erroll Babbage is forced to an early retirement due to his abusive behavior against the sex offenders that he should monitor, and shall spend his last eighteen days training his replacement Allison Lowry. When the seventeen years old Harriet Wells is considered missing in his area of work, Errol is convinced that her disappearance is related to one of his parole sex offenders. However, his superiors do not believe on his investigations and he convinces Allison to follow him in the sick underworld of pornography and perversions trying to find the missing girl.