Eiji is an aspiring scientist who just invented a new pain killer dubbed "My son". It's the recipe for eternal happiness, turning pain into pleasure (As demonstrated in Flowers of Flesh & Blood). Before his mother runs tests on 3 women, Eiji sneaks My son in with the drug his mother and intends on viewing them to watch for side effects. He runs into trouble when the women start mutilating themselves creating ecstasy out of delectable tortures.
The film is a gore extravaganza. Nipples are cutten off and consumed. Vagina's sawn off and eaten. Arteries slashed, gruesome piercings, and even the entrails exposed. This Japanese film has enough blood to please most gorehounds. This is a very solid psychological film with many disturbing scenes, a wicked twist ending, and frequent bloodshed. A great film that should be seen eventually although it does suffer from the casual imperfection.