Spidey links clues to the Spoiler, a mischievous villain who aims to spoil people's fun. Spidey defeats him, but the victory is bittersweet: A wall got spoiled when Spidey knocks the Spoiler through it.
Dr. Fly, a mutated half-human, half-fly plans to turn the world's inhabitants into the same type of mutant. He disguises himself as a vendor to distribute hot dogs laced with a formula of fleas, flies, and other insects.
At a New York Mets baseball game, a mutated half-human, half-wall creature sneaks up behind outfielder Grace Ivy and causes him to miss a routine fly ball. The umpire is also knocked down.