Florence and her lover Julien want to murder her husband by faking a suicide. But after Julien has killed him, he finds he has forgotten a telltale rope outside the window and he returns to the building to remove it... While going back up in the elevator, alas, the building custodian shuts off the power, stopping the elevator between floors. Frantic (also an alternate title along with "Elevator to the Gallows"), our man tries to escape, but he is truly trapped…