Alice and Peter are celebrating their retirement – and with it, a new phase in their lives. But when her best friend Magalie dies unexpectedly, Alicemakes a shocking discovery: She has had a secret affair in France, for 15 years! Confronted with the finite nature of life, Peter is thrown into an existential crisis. To bon-vivant Alice's great chagrin, he becomes a health fanatic. And when Peter invites Magalie‘s widowed husband Heinz tojoin them on a cruise, which Alice had hoped would breathe new life into their marriage, their harmonious retirement is over. Disappointed andhurt, Alice decides not to return to the ship during a shore excursion in Marseille. Instead, she sets out to find Magalie‘s lover…