His Dark Materials is set in a multi-world reality, with the action moving from one world to another. The series is based on Philip Pullman's trilogy of the same name, and set in an alternative world where all humans' souls manifest as animal companions called daemons. It follows the life of a young girl named Lyra, an orphan living with the scholars at Jordan College, Oxford, in a world governed by the Magisterium, a religious and political body. Lyra discovers a dangerous secret that involves Lord Asriel and Marisa Coulter, and is the subject of a witches' prophecy that she will change the world. In her search for a missing friend, Lyra also uncovers a series of kidnappings and a link to a mysterious substance called Dust, which leads her on a journey of epic proportions and ultimately to other worlds. The witches' prophecy also links Lyra's destiny to Will Parry, a teenager from the conventional world, who is himself being pursued by figures connected to his long-lost father.