In this Mexican adaptation of H.G. Wells's classic tale, Arturo de Cordova plays Carlos, a man wrongly convicted of murder. Luckily for him, his scientist brother (Augusto Benedico) comes up with a serum to make him invisible. Unseen by the authorities, Carlos slips out of jail and sets about to prove his innocence. His only problem? The serum's ugly side effect -- insidious insanity -- is beginning to creep up on him.

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