Diagnosed with an incurable illness, Charles, a rugby tycoon who has made a fortune in New Zealand prints an ad in his hometown looking for his sister that he's not seen in fifty years. A notary clerk, believing that Charles has a terminal illness responds to Charles' search for heirs claiming to be his sister. Charles finds that he was misdiagnosed and returns to France to meet his long lost sister.

2005 film by Florence Quentin

Two babies are switched at birth. When the mistake is discovered 12 years later, it leads to complications in the lives of both families. One family is affluent, with dutiful and (apparently) contented children. The other family is poor, with rambunctious (even delinquent) children, often hungry, but with lots of laughter in the house.