Three days in the lives of six friends, live in Grenoble, and have a rock band called the "Why Notes". They're to play at Charles's school reunion. In getting to Paris and back, the characters interact with Aimée's ex-husband and her abrasive, cruel ex-mentor, Louise's would-be lover who turns out to have a husband, Mickey's long-time lover, Bertrand's Germanic wife, and Frederic's distant mother.
