Novel
Wrongfully convicted of a robbery and murder, Paul Lavond breaks out of prison with a genius scientist who has devised a way to shrink humans. When the scientist dies during the escape, Lavond heads for his lab, using the shrinking technology to get even with those who framed him and vindicate himself in both the public eye and the eyes of his daughter, Lorraine. When an accident leaves a crazed assistant dead, however, Lavond must again make an escape.
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.