Lundi is young boy who lives with his aunt and uncle in switzerland in the late 1930s. One day while walking through the Swiss countryside, he finds a little girl who has lost her all her memories and does not know who she is. Lundi and his uncles name the young girl Jeudi, and lives with them. Lundi and Jeudi live happily together until one day a strange man kidnaps Jeudi because she reminds him of a beautiful women who rejected his love. Lundi follows them and rescues Jeudi, and then they set on a journey to find Jeudi's past. This journey takes to a women named Leonhardt and her parents, who is a great musician. Meanwhile they have to try to escape from the strange man named Earl and the Nazis during World War II.