Mad doctor uses his blind henchman to kidnap random women so he can use their skin in an attmept to restore the damaged beauty of his scarred daughter. Said to be Franco's take on Les yeux sans visage, it is actually more closely related to the West German Edgar Wallace-based krimis popular at this time, especially Die toten Augen von London (1961). However tawdry it's subject may be, it does boast fine moody photography and an interesting avant-garde score, and is much less a haphazard affair than many of Franco's later films. The mood is somewhat diminished by the rather awful English dubbing, though, which hides whatever nuances are in the orginal performances.
Obviously most of the unknowns are represented by the names in the cast list. I have been unable to locate any accurate cast list in any American or foreign source (even foreign movie sites merely quote IMDb's inaccurate & incomplete cast). Hopefully some Francophile will come along to help fill in the blanks...
See here for a detailed listing of what is missing in the US version from the original film, which accounts for the sloppy editing!