Follows a brilliant airline captain, Estelle, who has a perfect life with her husband Guillaume, a renowned doctor. Something is about to change as Estelle falls in love with Ana and starts and intense affair.

As adults, best friends Julien and Sophie continue the odd game they started as children -- a fearless competition to outdo one another with daring and outrageous stunts. While they often act out to relieve one another's pain, their game might be a way to avoid the fact that they are truly meant for one another.