Kežmarok is another of the towns we will visit in the free cycle of stories Behind the City Walls, so that we can get to know the beauty and part of the history of this town through a heartfelt love story. The story is set during the time of the Rakoczi Uprising. While the city struggles for its existence, Jacob, the son of a senator, fights for his love and his friend, the student Gregor, is haunted by the apparition of the Black Lady. And since Gregor is indifferent to neither the fate of the town nor the fate of his friend, it is Gregor to whom the Black Lady entrusts her treasure.

The Lord of the Springs finds the abandoned infant Pramek and unjustly neglects King Zoran. However, his daughter Dúhenka loves Zoran and becomes his wife despite her father's prohibition. The ruler of the springs becomes angry and deprives Zoran's kingdom of water as punishment. After the birth of her daughter Rosenka, Rainbow decides to sacrifice herself to save the kingdom and returns to the sky. Zoran and his daughter yearn in vain for years to meet Dúhenka. Rosenka grows up, she is fit for marriage, but she has one condition for the suitors: they must obtain rainbow water. But only Pramko can do that. And so the Ruler of the Springs must once again struggle with human emotions, and Rosenka and Pramko face many obstacles before they can convince him of the power of human love.