A doctor kills his girlfriend when he accidentally causes her to fall onto an ornamental flower which has metal spikes. He disposes of her by chopping up and then dissolving her corpse. The woman's sister accuses the doctor and an investigation begins. In the meantime, a second woman is killed and the doctor begins to receive metal petals through the post.

• Producciones Cinematográficas D.I.A.
• Parva Cinematografica
• Gianni Garko
• Carroll Baker
• Ivano Staccioli
• Pilar Velázquez
• Paola Senatore
• Umberto Raho
• Eleonora Morana
• Angelo Bassi