Buck Roberts is leading a wagon train of railroad supplies and Jim Corkle and his henchman Loder are out to stop them by using white men dressed as Indians for the attacks.

In a small village in the icy wilderness of Alaska Captain Peter Keith has to defend himself against two especially mean villains, who are after his wife Dolores and a boatload of precious hides.

After her father is killed by an outlaw, Dolores marries Peter. While they're at sea in the Arctic, Dolores meets the ship's captain, who is the man who killed her father. The captain causes an 'accident' to happen to Peter, so Dolores is all alone and defenceless as they drop anchor in a remote harbour.