Peter (played by Prince William lookalike William Moseley) is the oldest of the children, but his authority is disputed by his stroppy younger brother Edmund. Peter's somewhat priggish-sister Susan regards herself as a more responsible guardian of their small sister Lucy. It is, of course, Lucy who, in a game of hide and seek, discovers that a huge Jacobean wardrobe on the top floor contains more than just coats and mothballs.