A young female thief (played by Euro-beauty Marisa Mell) trying to escape from her former life and her thuggish, pimp-like ex-boyfriend takes a job as a nurse for the mute, disturbed son of a cold-hearted industrialist. Both the father and son quickly fall in love with her, not surprising since she looks exactly like the father's first dead wife who he hated but his son adored. Then she finds the deceased women's diary and gets an idea how she can turn the situation to her advantage through murder. But things go very awry when the man's other illegitimate son and her old boyfriend show up. . .
Only the Americans or the British would take a Spanish-Italian co-production innocuously title "La Ecadenada" and change the title to "Diary of Erotic Murderess" while at the same time cutting all the sex and nudity out! (To be fair though, the snipping could have been done by the old Franco regime who were even more prudish than the Brits and Yanks combined). What is left is not quite a giallo. It's one of Italian co-productions like "Top Sensation" or "So Young, So Lovely, So Vicious" that has suspense elements but lacks the combination of heady stylization, lurid content, and over-the-top hysteria to really make it as a giallo. The beginning is unforgivably slow--the "erotic" is non-existent, the "murders" don't occur until an hour in, so what you have left is a lot of shots of Mell reading from the "diary" in voice-over, which naturally does not good cinema make. The second half of the movie is much better and it ends with a pleasantly nasty surprise (which also, however, makes the English title a cheat in more ways than one).
Marisa Mell is very good in supporting roles in movies like "Diabolik" and "One on Top of the Other", but she's a little at sea here in a role that requires her to be alternatively evil and sympathetic. Mell just LOOKS too much like a voracious maneater to play sympathetic (you might as well ask the shark in "Jaws" to be sympathetic). She handles evil a lot better, but I couldn't help but wonder what a stronger actress like Rosalba Neri or Erika Blanc could have done with this role. Still it is not a BAD movie. Maybe if it ever appears on DVD unedited and in better condition, it will be appreciated more.
