Novel
Un preso condenado injustamente se escapa del penal de la Isla del Diablo. Para evitar ser descubierto, se disfraza de anciana y lleva consigo una extraña pócima que tiene el poder de reducir el tamaño y la inteligencia de los seres humanos. A continuación, se esconde en un laboratorio para planear su venganza contra los que lo enviaron a prisión.
Novel
A young man of society wants to make an expedition to Africa, but his fiancée asks him for help about one of her fathers guests shortly before his planed departure. Her suspects about that guest were serious, this man tries to steal one of her fathers rubin, and she and her fiance are kidnapped and brought to a house, where strange things happen. The whole thing becomes a nightmare under the direction of a mysterious Mr. Satan.
