Bibi and Tina, along with their horses Amadeus and Sabrina, face unexpected challenges when a bewitched school of ghosts threatens Falkenstein Castle.

Bibi and Tina welcome three new vacation guests to Martinshof. They call themselves Disturber, Silence and Spooky and they are simply different: Silence doesn't speak, Spooky believes in aliens and Disturber declares war on Bibi. She will drive the laughter out of Bibi! Disturber's mistrust even drives her into the arms of the mysterious V. Arscher, who is waging an elaborate campaign of revenge against Count Falko. The excitement caused by a meteorite shower from outer space is just what they need and they panic the whole of Falkenstein. No one can be sure anymore! But he hasn't reckoned with Bibi and Tina and their new friends, who aren't fooled.

Bibi and Tina, two teenage girls, embark on an adventure with their horses in the small village of Falkenstein. They encounter various challenges including a jealous businessman, a teenage witch, and a woman who turns into a man. Together, they navigate through friendship, love, horse racing, and magic.

Bibi and Tina face a new challenge when the boys from Schloss Falkenstein challenge them to a horse race. The girls must rely on their magical powers and teamwork to win against the boys and save the day.

Bibi and Tina face a chaotic adventure full of solidarity, tolerance, and friendship as they evade an arranged marriage and confront gender stereotypes, cultural clashes, and the challenges of a girl-horse relationship while supporting a refugee and singing on a bus.