Manolito de Vega arrives at the Paris house of Fransesca du Plessis, bent on revenge for all her has suffered during the war between Mexico and France. Fransesca welcomes him and does everything she can to help him, but it seems as if he will meet her kindness only with deceit.
When wars breaks out between France and Prussia, and Paris is besieged, Francesca discovers another side to the man she has loved from the beginning.