A Frenchman deserts his wife, and stealing her jewels, comes to Montreal, where he marries again. They go to Alaska where a pal tells the Frenchman of a chance to steal a shipment of gold. An old mail carrier transports the gold over a perilous country and he bears many hardships only to be overpowered and have his precious load stolen. Mack, who is also in the service of the government, rescues the mail carrier and defends the Frenchman’s wife, whom the latter mistreats. He loves the wife but she will not go away with him until the first wife appears on the scene for her jewels, setting the second wife free. The Northwest mounted police and people on the trail of the Frenchman find that in his attempt to hide the gold and make a “get-a-way” he has killed himself.