Alone with the Devil.

The manufacturer Laroque stops at nothing when trying to destroy his enemies, and this time Fréderic Nessières, one of his competitors, is in the line of fire. With his diabolical, hypnotic power, Laroque has snared Nessières’s wife, Madeleine, in his evil web, and she will now do anything to help her husband’s enemy. But even though Laroque’s first plan to ruin Nessières fails, he does not give up. Once he has selected a victim, he will quite literally fight to the death to vanquish them. (stumfilm.dk)