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The Transforming Human Series (変身人間シリーズ Henshin Ningen Shirīzu), also unofficially known as the "Mutant Trilogy," is a trilogy of science-fiction tokusatsu films produced by Toho from 1958 to 1960. It includes the films The H-Man, The Secret of the Telegian and The Human Vapor.[1] All three films revolve around kaijin, human-like kaiju, that were spawned by some sort of scientific experiment. Although the films do not share continuity, they share many similar premises and themes, and two of them, The H-Man and The Human Vapor, share the same director, Ishiro Honda.
When a narcotics deal goes sour and a suspect disappears, leaving only his clothes, Tokyo police question his wife and stake out the nightclub where she works.
Men are being murdered by a psycho called "The Telegian," who uses a matter-transmitting device to locate his victims.
A failed science experiment gives a librarian the ability to turn into a gaseous substance. He goes on to rob banks to fund his dancer girlfriend's career, killing those who interfere. Now Tokyo's most wanted criminal, can authorities stop him?