A young doctor is summoned to a castle and soon finds out that the owner, Dr. Orloff, played by Howard Vernon has created a monster that is invisible.
The doctor claims his daughter, Cecile is unstable due to a bizarre accident, but after the doctor spends the night in the castle he finds out who the insane one really is.
There are a couple of scenes in which the invisible monster attacks some women and it is very odd to see these naked women thrashing around pretending to fight off the invisible menace. Director Pierre Chevalier does the best he can with the material and the result is a twisted, but not all together unwatchable film. The print from Sinister is good and should please any horror fan who is undiscriminating.
This is a must for all Euro horror trash fans.