Detective Murdoch finds himself in competition with another police officer when he investigates the death of Humphrey Breen who has apparently fallen, or was pushed, out of a third floor window. The rival is North West Mounted Police Sgt. Jasper Linney who has come to Toronto from British Columbia to interview Breen, a possible witness in a death he is investigating in his own jurisdiction. Murdoch and Linney are remarkably alike in their interests and also in the way in which they try to use modern investigative techniques in their investigations. The murders center around a possible mining claim in British Columbia and there is evidence of fraud. When Murdoch sees his father's name on a list of possible land speculators, he travels there with Sgt. Linney. He soon learns more about the Sergeant than he could have imagined. As for his personal life, Murdoch has to figure out how to re-connect with Dr. Ogden now that he has ended his relationship with Enid Jones.