![Vincent Price](http://image.tmdb.org/t/p/w92/1B5qC9TdVc20e6pA5zpFsuoCXUg.jpg)
Industrialist François Delambre is called late at night by his sister-in-law, Helene Delambre, who tells him that she has just killed her husband, André. Reluctant at first, she eventually explains to the police that André invented a matter transportation apparatus and, while experimenting on himself, a fly entered the chamber during the matter transference.