After her brush with the Silver Pharaoh, Verity Fitzroy and the children of the Ministry Seven retreat to London to recover, but adventure always seems to have a way of finding them.With her Uncle Octavius still somewhere out there, Verity is sure the terrifying disappearance of children in the fogs of the capital cannot be a coincidence. The ancient mystery of the Emerald Flame is on the verge of being solved, which will mean an end to life and death...