When Emilia loses her diary in front of the school building, Max makes a serious mistake. Instead of returning it to her unread, he and his friends Leon and Mau take a look inside. The three of them can hardly contain their laughter when they read about Emilia's secret crush on a star of a children's series. Emilia listens in unnoticed and then ends their friendship. Max is devastated and tries to change Emilia's mood with gifts, but with little success. Only when he learns from Maestro Barenboim that, as with a change from minor to major, it is often the small gestures that can make a big difference, does he have the saving idea.