Pani Joanna, young Monika and jockey Zigmus find themselves involved in the mysterious story of a horse named Florence, which in turn becomes the object of close attention of criminal types. Florence is a unique horse, gallops faster than the wind, and therefore is of serious interest to bandits, After all, there is a lot of money circulating at the hippodrome. How do criminals know about Florence and how do they manage to blackmail players? Only Mrs. Joanna is able to get to the truth - with her ability to get involved in dangerous stories. But this time she has a wonderful assistant - the horse Florence. In the end, Joanna and Florence brilliantly expose two mafias at once - Russian and Polish, but first they have to face fights, murders and forgery And the secret of Florence will be revealed...