Winston Churchill lives an ordinary quiet life in the home of a physics professor in Hamburg. And it is not a surprise, because he is a smart and well-mannered aristocratic British Shorthair cat. Just one meeting changes his life in the most unpredictable way! One day the cat meets a twelve-year-old girl Kira.

They become friends, but once, during a thunderstorm, something incredible happens: they change bodies! This means that the Cat has to join the group of cool girls at school. Moreover, now he has to figure out the details of the strange situation that Kira’s mother got into. And to do this, he must bring to light a real gang of smugglers.