A pet? Not with us! Kralle is part of the agency for nasty creatures – and he really knows his stuff! The dog and his animal colleagues are booked by parents to completely ruin their children's desire for a pet. Because when Kralle and Co. visit the kids, they do everything to be unlikable: scratching, barking, stinking, and much more are on their agenda. No child knows that this agency exists, but among parents, it’s a well-kept secret. But then Kralle meets nine-year-old Louis, the cheekiest and most fearless child Kralle has ever encountered. And no matter how hard he tries, he quickly realizes: he likes Louis. And that’s exactly what shouldn’t happen….