Fantasy adventure based on the books by Tony DiTerlizzi and Holly Black. From the moment twin brothers, Jared (Freddie Highmore) and Simon (also Highmore), move with their sister (Sarah Bolger) and mother (Mary-Louise Parker) into their great, great uncle Arthur Spiderwick's (David Strathairn) run-down old house, strange things begin to happen. Unable to explain the unusual disturbances that seem to be occurring on a daily basis, the family blames Jared. Determined to prove his innocence, Jared enlists the help of his siblings in investigating what's truly responsible for the strange goings-on. Pretty soon, they uncover the truth of the Spiderwick estate and the magical creatures that inhabit it.