When Constable Oliver Wicken is found shot through the head in the basement of an abandoned house, everyone but Detective Murdoch seems satisfied to put it down to suicide. A gun and a note were found on the scene but the trajectory of the bullet raises doubt. Using unproven techniques such as taking fingerprints off the weapon, Murdoch satisfies himself that he has a case of murder. Working with the medical examiner, Dr. Julia Ogden, he is able to demonstrate that Wicken had been in proximity to a blond woman prior to his death. When Murdoch learns that Wicken was secretly engaged, he has a new line of inquiry to pursue. The solution however is found thanks to Murdoch thoroughness and his investigative skills.