Bumbling bank janitor Ernest P. Worrell is assigned to jury duty, and soon finds himself in trouble when he is covertly switched with a look-a-like crime boss. Ernest must escape from jail to expose the mix-up.
Well-intentioned, eternally bumbling Ernest P. Worrell accidentally releases an evil demon from its sacred tomb. As the demon flexes its power and goes on a ruinous rampage, good-guy Ernest tries to step in to save the town from mass destruction. Trouble is, a 200-year-old curse has scared Ernest...