Like peas in a pod, Fritz and Ben are the best friends in the world. And because of that, they are always there for each other. Now comes the issue with swimming lessons. Since Ben was very sick as a baby, his mother still believes that her son should "take it easy." This is quite exhausting. Because Ben is not allowed to do anything that boys enjoy: no participation in physical education, no soccer, no tennis. Ben and Fritz find this boring. So the two of them secretly try to get Ben, the non-swimmer, ready for the swimming badge without him noticing. It's not easy when someone is so afraid of water that they won't even dare to take a bubble bath!.