Railroad builders, preparing to tunnel through the mountain where Snagglepuss resides, encounter so much trouble from the firmly entrenched lion that they ask big game hunter Major Minor for assistance.

In Siberia, an archeological expedition searching for prehistoric fossils discover a large prehistoric monster, perfectly preserved in a state of suspended animation in the ice.

The stooges are stage hands who also have small parts in a big play. They quickly get on the bad side of the producer. First they fail to prevent a famous critic from sneaking into the audience. Then Shemp accidentally adds a pot holder into a cake they bake as a prop. During the play the stooges (as southern gentlemen) and the rest of the cast spit up feathers during what was supposed to be a serious scene. The critic thinks it’s a hilarious satire and the boys are redeemed.