A mad scientist creates a hideous monster to carry out his murderous plans.
I watched this on Netflix streaming, so I have to say I do not think they had the best copy possible. At times it seemed like a poor digital transfer from an old source. This did not really hurt the movie, but I just want to say if you want to see this film in its best light, you may want to look elsewhere. (Though, for all I know, no good copy exists.)
How this film ties together Orlof, Jekyll, an robots is a bit confusing, not helped in the least by the translation issue. I watched it as "Monster of Dr. Orlof", which seems to suggest a far different film than "The Mistresses of Dr. Jekyll", and yet they are one and the same.