Fiona Scott, a mute woman working as a maid for the Clark family, often faces bullying due to her inability to speak. She accidentally discovers that the lady of the house, Elsie Taylor, is having an affair with the butler, David Martin, and is pregnant with his child. They secretly plot to murder Mr. Roger Clark and frame Fiona for the crime. Enraged, Fiona Scott gathers evidence and ultimately exposes the true faces of the adulterous couple.
