Shortly before her wedding, art gallery director Nora travels from Paris to Grenoble to visit her preteen son, Elias, who is spending time with her aging professor father, Louis, recently diagnosed with terminal cancer. During her stay, she reaches out to her former lover, Ismaël, a viola player and father figure to Elias who has been committed against his will to a mental hospital. Ismaël, however, has his own problems to sort out.

Nicholas is the eldest son of a wealthy suburban family, whose businesswoman mother makes deals from a helicopter and has an affair with her business partner. His cheerful, alcoholic father, on the other hand, is reduced to a prisoner in his room with his devoted dog and electric train set. Unbeknownst to his parents, Nicholas works as a window cleaner and dish washer in a Parisian cafe. He is also in love with the daughter of another cafe's owner, who, however, has an abusive boyfriend. One night, Nicholas sneaks a few drunken drifters into his family wine cellar and his father unexpectedly takes a liking to the stranger.