AllMovie

Can it be true that Superman has become an outlaw? Actually, it's a petty thief named Severn, who wears a Superman costume while committing various robberies, but the police don't know that. Reporters Lois Lane and (especially!) Clark Kent are anxious to prove Superman's innocence, but instead they're assigned to cover the opening night at the Metropolis Opera House. As luck would have it, the phony Superman picks this very moment to steal jewelry from the various operagoers--prompting Clark to discard his rented tuxedo, don cape and tights as the REAL Superman, and settle accounts with his larcenous lookalike.