A serial killer remains free in Buffalo, New York after a task force comprised of state and local authorities fails to apprehend him and the wrong man is imprisoned. No one is more frustrated than Terry Levine, the state police investigator who headed up the team. Ordered to leave the case alone by his superiors, but unable to let a killer continue his murderous ways, Levine reaches out for some help to continue the investigation in a different kind of way.
Meanwhile the man dubbed the Sin Killer by the media chooses to tackle new challenges, particularly when he crosses paths with a mafia henchman who has a murderous reputation of his own. The mafia man wants out of the business when his employers begin aligning themselves with the dangerous Russian mob that arrives with false promises. The hitman reluctantly agrees to carry out an important assignment that will forever link his association with the Russians one way or another. If he fails, he places his family at risk while his mafia family will feel the wrath of the Russians.
While Levine begins gathering evidence through his sources that will take the Sin Killer off the streets for good, the serial killer draws closer to his new target, unaware of how many lives hang in the balance if he kills the hitman. Blood soon spills and Buffalo area police find themselves trying to conduct multiple homicide investigations, knowing they still have to arrest the true Sin Killer. Now running out of time, Levine knows he must stop the serial killer before the man's insatiable urge to kill adds to the death toll.