It is the summer of 1883 and Professor Langdon St. Ives - brilliant but eccentric scientist and explorer - is at home in Aylesford with his family. However, a few miles to the north a steam launch has been taken by pirates above Egypt Bay; the crew murdered and pitched overboard. In Aylesford itself a grave is opened and possibly robbed of the skull. The suspected grave robber, the infamous Dr. Ignacio Narbondo, is an old nemesis of Langdon St. Ives...