A calculating killer coerces a detective to pay for his previous mistakes.
      A series of deaths have started occurring in New York; Some are being found mutilated while other have an equation wÎ"z = Cov (w,z) = ßwzVz carved onto their skin. As police investigate they discover each victim was forced to choose between sacrificing their own life or a loved ones' life. Before long it becomes clear that this perpetrator has suffered just such a similar fate...so now is coping by seeking a way of solving this philosophical enigma, can Captain Maclean and his officer such as Eddie Argo and his new partner Helen Westcott stop this suspect, because he/she won't not until he/she gets to the end of this equation.

 Detective Eddie has been in dealing with the underworld , their cruel practices common , but also getting a little tired of this life . A he and his new partner Helen investigation a series of homicide and found that seems to by a notorious local gang . To find out the truth , Eddie needs to re - read an old cases before him do before . That case Eddie is one of painful memories . In fact, the killer 's ultimate purpose is to want Eddie to pay the price once the mistakes . Now a question put in front of Eddie : In order to save their lives , you will kill their loved ones ?