When Anton's father cancels their planned summer vacation, Anton and his mother quickly set up their tent in the middle of the forest. Of course, their guinea pig Pünktchen can't be left out. The forest is much more exciting than the campsite. There are no kids here to make fun of Anton. The days fly by – until suddenly the cheeky Liane shows up. It's only when Pünktchen and then his mom go missing that Anton is really glad he can count on Liane.