El horror oculto, narra la historia de un hombre y sus dos compañeros, quienes deciden pasar una noche en la Mansión Martense, cuya horrorosa reputación está repleta de episodios ominosos...

I am writing this under an appreciable mental strain, since by tonight I shall be no more. Penniless, and at the end of my supply of the drug which alone makes life endurable, I can bear the torture no longer; and shall cast myself from this garret window into the squalid street below. Do not...