Five years after the events of The Dark Space, Elli, Lance and Will are living happily on the farm in Cheshire, with their enlarged family. But visitors from their past arrive, to bring disruption and worry, and eventually the chance of adventure for Will. This will involve a mission to another world, to help the man they first knew as Lyn Sayer - the fabled Merddin Emrys, or Merlin. But at what lasting cost to their quiet life? This story, the last of The Edge of Doom trilogy, explores further old myths and legends, giving them a modern twist, and reuniting readers with old friends from the first two books, as well as introducing new.