Inside a grand Parisian apartment lurks a murderous monster. From the outside, Madame appears typical of the wealthy and well-dressed elderly women living in the 7th arrondissement of Paris, but underneath the perfectly set hair and pearls lies a heart full of hate. Hate for the foreign couple living next door. Hate for the children who play in the courtyard. Hate for the single mother living above. Hate for the young workman outside her window. And as she furiously shuffles about her dark and eerie apartment, Madame’s hatred is stirred by the toxic whispers uttered by the ghost of her late papa. Tonight, Madame’s hate will reach boiling point. Tonight Madame will become a murderer and blood will flow across her parquet floor. But tonight Madame will discover that murder is not an easy activity for the elderly.