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The Master Key is a Canadian fantasy/mystery film, directed by Patrice Sauvé and released in 2009. A continuation of his earlier television series Grande Ourse and L’Héritière de Grande Ourse, the film stars Marc Messier as Louis-Bernard Lapointe, a wizard who is seeking to rescue his friend Émile. To succeed, he must enter a labyrinth and solve a complex puzzle in order to locate the master key to all parallel universes, within just twelve hours.