The adventures of an unusual dog, part St. Bernard, part Scotch shepherd, that is forcibly taken to the Klondike gold fields where he eventually becomes the leader of a wolf pack. . -- Calm, stoic captain Mac Whirr has just been given command of a new steamship, the Nan-Shan. He and his crew are transporting Asian workers across the China Sea when a sudden drop in atmospheric pressure alerts Mac Whirr of, "some uncommonly dirty weather knocking about."