Superheroes fly secret

At first sight she seems quite normal, the family of Karline Lund. And they have to be, because only in secret can the Luds save the world day after day. All except Karline. She doesn't have a single superhero ability. Until one day she hears a ferret calling for help from a school bag. And not only that: Karli can suddenly understand all the other animals too. She only realises that her new abilities are quite practical when her friend Jonah's father disappears without a trace. The only thing that is stupid is that the kidnapped man is none other than Professor Pangasius Puvogel, the most famous superhero researcher of all time ...