Dim-witted Ernest (Jim Varney) is a janitor at a bank who gets called for jury duty. It turns out that the murder defendant, Felix Nash (also Varney), is a dead ringer for Ernest. Nash's lawyer (Jeffrey Buckner Ford) arranges a switch, and Ernest finds himself on death row while Nash goes to work at the bank, scheming up a way to rob it. Ernest then sets in motion a plan to escape jail, foil Nash's plot, snag the bank clerk job he covets and rescue his favorite teller, Charlotte (Barbara Bush).