Michi and Vicky are getting married. And Eder is supposed to be Michi's best man. So far, so good, if it weren't for Pumuckl, who also wants to experience the great feeling of love that Eder raves about. Pumuckl also wants to be swept off his feet, sail into the harbor of marriage, and anchor a three-masted ship directly in the bay of matrimony. And so the wedding celebration turns out very differently than everyone had imagined.

This summer, Pumuckl and Eder have a lot going on: a turtle, a trip to the countryside and then neighbor Burke's birthday! Perhaps too much - because with so many events going on, the two of them are barely able to maintain their friendship. And when a big misunderstanding arises, everything changes between Eder and Pumuckl...