Oscar winning director Michel Hazanavicius (2011's Best Picture, ‘The Artist’) turns to animation to present this powerful and unsettling story set during the height of World War II. Once upon a time, a poor woodcutter and his wife lived in a great forest. One day, the woodcutter's wife rescues a baby girl thrown from one of the many trains that constantly pass through the forest. This baby, this "most precious of cargoes", will transform their lives, as well as those whose paths the child will cross - including the man who threw her from the train. Some will try to protect her, whatever the cost. Their story reveals the best and worst in the hearts of mankind.