An assassin is hired by a mystery woman, via an intermediary, to torture and kill seven men.These men were responsible for an incident in the woman’s past and she has waited for many years to exact her revenge.The killings are brutal and the murderer leaves no forensic clues to his identity. The police deduce that there is a contract killer involved and as the killings continue several suspects are identified but one by one each is cleared as a suspect.Interpol becomes involved in an attempt to identify the killer but all lines of enquiry come to dead ends.The police are desperate to unravel the one clue that might identify the paymaster but, as, one by one, the men are murdered, there is no thread to pull.