That night, someone dressed in black and wearing surgical gloves brutally murders her after injecting her with a chemical that leaves her paralyzed but still conscious.

Tellini visits a scientist acquaintance of the woman, who demonstrates that a species of wasp will use a toxin to paralyze and eviscerate a tarantula to lay its eggs in the corpse.

Jenny spends the night at a friend's house but is followed by the killer who brutally murders her, and then leaves her body in a trash bag to be found the following day.

Tellini interviews some of Jenny's coworkers, including the aloof Laura, a nurse who wears gloves identical to the killer's, and the blind masseur, who takes off his darkened glasses to reveal colorless, unseeing eyes.

Satisfied at solving the case but still disillusioned with police work, Tellini wanders the crowded streets of Rome.

It is one of many Italian giallo films to be inspired by Dario Argento's successful debut thriller The Bird with the Crystal Plumage.

Though fairly obscure for many years the film has recently made a comeback thanks to the rising fan base for the giallo genre.