In this murder mystery, a woman's brother is killed in a freak accident, or so she believes. Fortunately for her, an American journalist is more suspicious and so begins roaming the London streets in search of the killer.

Marine atomic tests cause changes in the ocean's ecosystem resulting in dangerous blobs of radiation and the resurrection of a dormant dinosaur which threatens London.

During the War, a British agent travels to the remote Glennye Castle in the wilds of Scotland to investigate a mysterious murder by a masked phantom. Who or what is the phantom? And how are the Germans involved?