The heart-warming story of one little dog's big adventure, and the lives he changes along the way.This Christmas, anything could happen...When their dog goes missing during a day trip to London, the Walker family are forced to accept that they may never see Henry again. But as the family search for their beloved pet, the reality of what has happened to Henry never even crosses their minds: Henry has been mistaken for one of the Queen's prized corgis.Swept into Buckingham Palace, Henry is about ...