Few years ago, the town was threatened with a serial killer. Many victims fell on his trap, especially women. The series of murders were up to now are unsolved. No one could even get a single clue to point who or where the killer is. This killer is an expert in hiding his trails. But he committed a single and a very minute mistake before. That was the beginning of his doom. Because this very small piece of evidence is all that was needed by the greatest detective of all time.