oin Lucy, Edmund, Susan, and Peter, four siblings who step through a magical wardrobe and find the land of Narnia. There, the they discover a charming, once peaceful kingdom that has been plunged into eternal winter by the evil White Witch, Jadis. Aided by the wise and magnificent lion Aslan, the children lead Narnia into a spectacular, climactic battle to be free of the Witch's glacial powers forever!

Overview from themoviedb.org