Uncle Scrooge laughed when the mysterious woman offered him one dollar for one of his dimes. But she might just have the last laugh because the dime he accidentally sold her was his lucky Number One Dime -- the first dime he ever earned! -- and now she's about to melt it down for one of her strange spells! Then Uncle Scrooge gets wind of a big gold-prospecting contest in Alaska, and he ropes Donald and the boys into helping him prove he's just as...