Vincent, a wealthy real estate agent, is invited to dinner by his sister Elizabeth and her husband Peter, both professors in Paris. Claude, a childhood friend and trombonist in a symphony orchestra, is also present. Vincent brings news from the prenatal examination of his and his wife Anna’s unborn son. The name chosen by the soon-to-be parents strongly offends the others for many reasons. The dispute between the guests quickly escalates and before long the resurgence of old grudges and hidden secrets is unavoidable …

Following a huge misunderstanding, two friends always decide to tackle everything to make up for lost time.

Sebastien Nicolas is a reclusive realtor leading a double life – in his spare time he creates complex disguises based on acquaintances. Combined with minutely studied and rehearsed impersonations, Sebastien can disappear completely into other people’s lives. Things spiral out of control after he impersonates the wrong man.