When a mysterious "John Doe" wakes up in a morgue and wanders into a psychiatric ward, a devoted doctor and curious medical examiner must slowly uncover dark and sinister secrets about the man that reveal a more horrifying truth than they could have ever imagined.

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.