The lovable Munster family finds their placid world turned into turmoil by the diabolical Dr. Diablo, the mastermind of an art heist using monster robots, including clones of Herman and Grandpa.

George Lutz, his wife Kathy, and their three children have just moved into a beautiful, and improbably cheap, Victorian mansion nestled in the sleepy coastal town of Amityville, Long Island. However, their dream home is concealing a horrific past and soon each member of the Lutz family is plagued with increasingly strange and violent visions and impulses.