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.

Gaira, a humanoid sea beast spawned from the discarded cells of Frankenstein’s monster, attacks the shores of Tokyo. While the Japanese military prepares to take action, Gaira’s Gargantua brother, Sanda, descends from the mountains to defend his kin. A battle between good and evil ensues, leaving brothers divided and a city in ruins.