Death stalks London and the newspapers proclaim that a mummy’s curse has been unleashed. Sir Maurice Newbury, gentleman investigator for the crown, is drawn into a web of occult intrigue as he attempts to solve the murders. And he soon finds himself on the trail of a rogue agent – a man who died to be reborn as a living weapon.

Meanwhile, Newbury’s able assistant, Miss Veronica Hobbes, has her own mystery to unravel. Young women are going missing from a magician’s theatre show. But what appears to be a straightforward investigation puts Miss Hobbes in mortal danger.

Can Newbury save his assistant, solve the riddle of the mummy’s curse, capture the deadly man-machine and stop the terrifying Osiris Ritual from reaching its infernal culmination?