Under a False Name (2004)

After reading a postcard that her mother let go in the wind, a woman learns that she has a twin.

The small Norman village of Allouville is proud of its thousand-year-old oak tree. But one day, a project of enlargement threatens the tree. The deputy Charles Crétois was keen on this project, which allowed him to continue the speculation he had been indulging in on certain lands. He is supported by the mayor of Allouville to whom he promised the Legion of Honor. But the whole village protests: they want to save the oak tree.

1910年の春の夜、フランス上院議員の屋敷では、各界の名士を招いて夜会が開かれていた。突然、灯りが消え、再び灯りが点くと数枚の名画が姿を消していて、アルセーヌ・ルパンの名刺が残されていた…。