Professor Orloff has created an invisible man-beast who, he assures Dr. Garondet, his unwelcome guest, is well trained and intelligent, but who needs to drink human blood to stay alive. Dr. Garondet seems a bit put off by this revelation, but is willing to set it aside to help Cecile, Professor Orloff's mentally deranged daughter.

I think it's appropriate to digress here a moment and discuss the little known physical and artistic demands of acting while invisible. It's physically demanding because the invisibility creams developed for actors in the early invisible man movies were toxic and irritating to the skin, and could leave unsightly rashes. Typically the invisible actor would be expected to do all his own stunts. And since the invisibility creams were extremely expensive and took a long time and effort to apply, the actor could expect to remain naked and invisible for long periods of time, at risk not only for hypothermia but also of injury from people bumping into him or objects falling on him. Body doubles were rarely used until recently, and then only for big name actors. Despite his denials, it's well known that Kevin Bacon had a body double for his invisible scenes in Hollow Man, as did Jessica Alba in Fantastic Four.

The artistic demands of invisibility are equally severe, as the actor has only his voice and the ability to, say, move chairs, lift lanterns, murder, and rape to communicate what must certainly be the ultimate condition of existential loneliness.

In this movie the loneliness of the invisible man-beast is communicated by his rape of a young woman, which I think is an effective choice.

The servant woman is sexually assaulted as Professor Orloff watches approvingly. At least I assume that this is a sexual assault. At the risk of seeming ungentlemanly, I have to point out that her legs are never parted. Her distress is evidenced by her rolling about on the hay, groaning, and sighing.

The unconscious woman is then taken by Professor Orloff to be drained of blood to feed the invisible creature.

Shortly thereafter the man-beast knocks Dr. Garondet to the floor, and attacks Cecile, stripping her of her nightgown.

Judging from her expression, Cecile is either paralyzed by fear of her incipient violation by a ravening horror she can't see, or has just noticed that one of the paintings on the wall is slightly askew. Dr. Garondet picks up a bag of powder and flings it where he believes the invisible man-beast to be, and voila! at last we see him in all his terrible glory!

Garondet knocks the creature in the head with a poker, and he and Cecile escape.