Mathieu lives in Paris. Alice lives in a small seaside town in western France. He's in his fifties and a well-known actor. She's over forty and a piano teacher. They fell in love some fifteen years ago. Then they separated. Since then, time has passed, each has gone his own way and the wounds have gradually healed. When Mathieu comes to dilute his melancholy in the whirlpool baths of a thalasso, he meets Alice again by chance.