Three, two, one "Karramba!" Admittedly, a camping holiday with Grandma and Grandpa isn't exactly the coolest. But it isn't until Anton discovers that there's no swimming pool, only a lake, that these holidays turn into a real disaster. Jumping off the diving board with a cannonball like all the other kids? Into that disgusting muck? No way! But then Anton makes a special acquaintance with a fish. And thus begins a holiday adventure that Anton never imagined in his wildest hero fantasies.