During the 1950's, Inoshira Honda, Japan's master director of monster movies aimed his films for adults (like this one), as opposed to his more kiddie-aimed monster films of the 1960's. The Tokyo police think their most notorious gangster skipped town. A young scientist (Kenji Sahara) believes otherwise. He believes the gangster dissolved and turned into a liquid monster. The police finally believe him when they encounter the H-Man at a nightclub (Where some dancers, and cops dissolve) The film concludes with a manhunt/rescue in the Tokyo sewers. The H-Man is a colorful, fun combination monster film/film noir. Despite the middle section of the film being dull, (white lab coated doctors arguing with skeptical detectives) the monster scenes abound in glorious EastmanColor, excitement and sensuality (Yumi Shirakawa, Inoshira Honda's leading lady is quite appealing as a sultry nightclub singer caught in the H-Man mess.) The special effects go for a dreamlike surrealism, rather than realism.