The free medieval city with the majestic castle, the picturesque market square and cozy houses is conquered by troops of the spiteful knight de Malicorn. The mean tyrant dispatches spies everywhere, hires informers and is going to marry the first beauty - Veronika with distinguished shape of Marianna Vertinskaya. But the freedom-loving humpback Karakol to whom disposal of a hump and a wedding with Veronika is predicted brings together the humiliated inhabitants on fight against conquerors.