Pluto is pressed into duty to deliver a sack of mail to a remote arctic outpost, helped along by a playful arctic rabbit.
The weather forces a mail plane to turn back. It drops the mail at Outpost #5, staffed by Pluto, who is to carry it to the next airport. His mission is briefly thwarted by a totem pole (hence, this is probably Alaska), but his real enemy is a rabbit who covets the blanket on Pluto's sled. They chase each other down some treacherous winding slopes before they end up at the landing strip, where the two of them crash into a snow bank and send the mail pouch right into the pilot's hand.—Jon Reeves <jreeves@imdb.com>
When a pilot has to turn back due to a severe storm, he drops the mail at a remote outpost where it can be delivered by dogsled. The falling mail pouch lands on Pluto, and he sets out to deliver it. He is continually delayed by a rabbit along the way, but in the end, the rabbit helps Pluto deliver the mail pouch.