Johann Wallenberger, a wealthy industrialist, emerges from the haunted house ride at a Madrid amusement park dead and missing a bag of cash. His insurance company is suspicious, of course, so they assign the case to their top investigator, playboy detective Chris Buyer (Robert Hoffman). Chris goes undercover by starting a relationship with Wallenberger's youngest daughter, Catherine (Pilar Velasquez) and she soon takes him home to meet her outspoken sister Barbara (Patrizia Adiutori) and her mother, Magda (Irina Demick). But Chris finds more than he bargained for as the fragile Catherine takes ill, hot-blooded Barbara seduces him, and Magda loses her grip on reality in the wake of her husband's suspicious death. Before long, more killings occur – could they be covering up a blackmail scheme? Or are long-held grudges finally coming due? Could the killer be Gunther (Howard Ross), the creepy caretaker or Magda herself? Or perhaps Chris's rival investigator at the insurance company is sabotaging his reputation?
The title Naked Girl Killed In a Park (not to be confused with Naked You Die) has a sensational newspaper-headline urgency, but the story hits all the standard giallo beats. It does have three endings, though. About an hour in you'll say "boy, they wrapped that up quicker than usual" and then discover that there are still questions to answer. Then there's a twist and a killer is named. Then that killer is murdered and the real mastermind is dispatched in a satisfyingly gruesome fashion.
- The title is sort of accurate. A naked girl is found in a garden on the grounds of the Wallenberger estate - not a public park as the title suggests. Johann's body was found fully clothed in an amusement park.
- You may remember Adolfo Celi (Inspector Huber) from Who Saw Her Die? or as Largo in Thunderball.
- The same year he composed the score to Naked Girl Killed In a Park, Carlo Savina conducted the recording sessions for Nino Rota's Oscar-winning soundtrack to The Godfather.
Shortly after they meet, Chris takes Catherine on a date to the amusement park. Yes, the same amusement park where her father was found murdered only days before. Way to be sensitive, Chris.
Just because she's in mourning doesn't mean Magda can't dress a little flashy. Check out this sparkly sequined jumpsuit.
And this sexy, backless evening gown.