The film is based on the best-selling novel of the same name by Holly Black and Tony DiTerlizzi. Single mother Grace (Mary-Louis Parker Mary-Louise Parker) moves into Spitwick's ancestral home with twin sons Jared and Simon (Freddy Hamel Freddie Highmore) and eldest daughter Mallory (Sarah Berg Sarah Bolger), and unexpectedly encounters a series of strange things. In the course of his own investigation, Jared found the elven exploration guide of his uncle's father Arthur Spitwick (played by David Stryzyne David Strathairn) in the attic on the roof. Despite a warning on the surface of the book, Jared read the guide and then saw one of the elves described in the book, Simbretek (voiced by Martin short). Simberlatek warned Jared not to take the book outside the Spitwick ancestral protection circle, in case the evil spirit Morgeras (Nick Nott Nick Nolte) took the guide for himself and harmed others.