Professor Langdon St. Ives, a brilliant, if slightly eccentric, scientist and inventor, enjoys family life on a luxurious estate: he plays with his son and daughter, goes fishing with his wife, plans to fly to his heart's content in his own airship, and dreams of owning an elephant. But his worst enemy, Dr. Ignacio Narbondo, is not asleep. He is already planning a new crime. And if the vivisector necromancer manages to carry out his plans, the streets of destroyed London will be filled with the spirits of dead people! In the meantime, Narbondo is busy robbing graves, causing explosions, and at the same time kidnapping Saint-Yves’ son, Eddie. And the professor gives chase...