The summer is so hot that even the well has dried out on the Martin's farm. 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. To no avail at first – until a mysterious young Spanish boy named Chico de la Mancha appears.

Bibi and Tina take a short ride to the lake, where Alex does a radio field piece about “mermaiding”. The fact that Chico not only starts working at the Martin's farm, but also comes along with them to the lake, does not suit Bibi well. She thinks Chico is a show-off and is hiding something from them. On top of that he cannot swim and appears to be drowning!

Finally, some rain! But today of all days, the social media celebrities Fritzi and Mitzi come to visit the Martin's farm. Bibi and Tina have to think quick to get a good review for the Martin's farm. On top of that, the young, mysterious entrepreneur Kim Win Win arrives at the Martin's farm, to buy land and Holger falls head over heels in love with her.

Bibi, Tina and Alex are furious that Count Falko declares open season on the boars, who have repeatedly destroyed the corn fields. Chico on the other hand is on Count Falko's side and wants to help him with the hunt! Bibi becomes a boar using her witchcraft, and will solve the problem her way.

A horseback riding accident makes Tina suffer from amnesia and fall for Chico! She does not care for Bibi and Alex any longer and no matter what they do, nothing seems to bring the old Tina back. And who is the woman who calls Chico so excitedly – his girlfriend?

It's the night of the super moon. Ideal for a game night in the barn, according to Bibi and Tina. During a game of “truth or dare”, Bibi tries to test Chico and wants to find out who the ominous woman from the phone call was, to reveal his real secret.

When Chico tells Count Falko that he is his son, he turns away. On top of that, the horse Allegro is on the loose and Bibi and Chico have to catch him before someone gets hurt. A storm is coming, and fate is in their hands.

The storm is here. Bibi and Chico bring Allegro to the stable of the Martin's farm and meet Tina and Alex. Alex gets to know Chico's secret and is outraged about how his father has been behaving. Because he is filled with joy to finally have a brother! With the help of some witchcraft, Bibi gets Count Falko to come to the Martin's farm, to make him talk.

Count Falko wants to introduce his son to the whole town of Falkenstein and invites everyone to an event at a local restaurant. According to Bibi, Chico's mother, Elena, cannot miss that and with the help of some magic, she travels to Spain to get her. But she learns from Elena that Chico is not Falko's son.

All's well that ends well? Bibi, Tina, Alex and Chico wanted to celebrate their friendship, but then they learn that Mrs. Martin has been convinced to sell the land to Kim Win Win. Her plans for Falkenstein are way bigger than expected. So big that Bibi can't help but to do magic again.