Milka Muller is the general director of Chocolates Muller, who lives in Switzerland with her husband André Polonski, a prestigious pianist, and Guillaume, the son of André. Jeanne Pollet is a young pianist who has not yet begun her studies at the conservatory and who one day discovers that when she was born she was about to be exchanged in the hospital for Guillaume. Determined to know its origins, Jeanne goes to visit André.—Miguel Ángel Díaz González