This evocative poster is for the 1975 thriller Perversione, which was originally made in Spain as La encadenada, and for its U.S. release was retitled Diary of a Murderess, or Diary of an Erotic Murderess. Spoiler alert: there’s a murderess in this film. Marisa Mell is nurse to a rich widower’s mentally disturbed son, but she turns out to be a grifter intent on liberating some of the family knick-knacks. She's especially covetous of an antique chalice that resides in a safe. At some point, she finds a diary left behind by the widower’s dead wife, and in its pages the departed plots the murder of her husband, writing her plan in helpful step-by-step detail. Mell decides follow the diary’s instructions, all the better to get hold of that chalice.

But nothing is as it seems here. The chalice is actually the Holy Grail, Mell has actually failed to ditch her terrible husband, and a few other surprises pop up to keep viewers guessing. Director Manuel Mur Oti has crafted an atmospheric piece here, but we recommend it for giallo fans only, because it’s a bit slow off the starting line. Also, we suggest watching the original version, because we’ve heard that the American cut is several minutes short on nudity. It may not matter though, because the movie may be impossible to find. We located our copy online, but the links have since died. Not that we’re recommending any illegal downloading. Us? Never. Perversione premiered in Italy today in 1975. Below, just because we can, we’ve posted an image of Mell at her lovely best, and you can see another one of great interest here.