Three days in the lives of six friends who are nearly 30 years old live in Grenoble and have a rock band called the "Why Notes?". They're to play in Paris at Charles's school reunion. In getting to Paris and back the characters interact with Aimee'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 and her children Bertrand's Germanic wife and their children who speak no French and Frederic's distant mother. The band also meets Clara a mercurial free spirit who beguiles Bertrand then Mickey then takes up with someone else in the band.