Chaplin Untold Story project begins with the discovery of a mysterious letter Charles Chaplin kept secret for years, locked away in the drawer of his personal bedside table. This letter contained the keys to answer the question Chaplin asked himself all his life: "Who am I ?" With this letter in hand, Michael Chaplin, Charlie Chaplin's eldest son, takes us on the roads for a journey into his personal perspective on his father's Work and the unexplored roots of the greatest figure of the American Cinema.