Apartment 37413 Once a week three crazy brothers meet to relive their childhood disorder eating human raw organs and living a sadomasochistic rapport/intercourse... Apartment 28513 The torture of Barbie. A man enjoys torturing and scarring Barbie, but one day he'll decide to do it with real women... Apartment 13396 A painter uses his blood and his muse's faces to prepare the perfect colors for his masterpiece... Apartment 1932301 A woman is looking for a way to becomes excited and she'll discover it touching/with the contact of insects and cockroaches... Apartment 121197 A self-destructive necromancer conserves the mummified corpse of his husband and every night she has sex with it... Apartment 7428M An erotomaniac obsessed by a clown who is in his house blowing up balloons and exploding it.

Rome is shattered by a series of gruesome murders that paint the Eternal City deep red. The suspicion grows that these atrocious crimes are connected with the return of one of the most heinous serial killers of our time - Karl the Butcher.

During an analytic session, a psychologist recommends that one of her patients be admitted to a specialist clinic, but this decision unleashes the mysterious individual's latent madness. Abandonment is the key to his delusion, which will lead him to kill once again, as he had done in the past with his first, lost love. So, after disposing of the analyst's body, he decides to continue the "therapy" alone with the aid of a small video camera, recording his emotional states in a hallucinatory crescendo.