The summer is so hot that even the well on the Martin's farm has dried out. Bibi Blocksberg, vacationing with her best friend Tina Martin, wants to convince Count Falko von Falkenstein to pay for the drilling of a new well. Tina's boyfriend Alex von Falkenstein, who is doing an internship at Radio Flamingo in Rotenbrunn, doesn't think that's a good idea. His father is in a terrible mood because of the heat. Indeed, Bibi and Tina's plan fails at first - until a mysterious young Spanish boy named Chico de la Mancha appears and knows how to convince Count Falko with a lot of charm.