Bibi Blocksberg visits her best friend Tina at the Martinshof. The well has no more water! Bibi and Tina want to persuade Count Falko von Falkenstein to take on the cost of drilling deeper down. But things go horribly wrong - until a mysterious young Spaniard named Chico de la Mancha comes into play... A summer full of adventures with the best friends there are: Bibi and Tina!