Harry and Monica were once a popular musical duo called Harmonica. In the nineties, they sold out stadiums and were at the peak of fame. 16 years later, almost nothing remains of their success and family happiness. The group broke up, and their marriage is bursting at the seams. To save their relationship and improve their financial situation, the heroes decide on a nostalgic tour across Europe. This journey will become a serious test for the spouses. They will have to get to know each other all over again and decide if they have a shared future.