There is a jousting tournament at the medieval market in Falkenstein. Of course Bibi and Tina plan to participate. The Count even gives them real armor to wear. But after an attempted break-in at Martin's Farm, they have to return it. No armour means no tournament! Does this mean their competitors will triumph?

When Bibi and Tina find a cat, they bring it to the Martins Farm. But there are so many stray animals in need of help! Suddenly the whole barn is full. A horse farm is not an animal shelter. Ms. Martin remembers an old lady from the past who looked after animal orphans in Falkenstein. Bibi and Tina want to visit her.

Bibi and Tina are disappointed: The Martins Farm's birthday is supposed to be canceled this year! Tina's mother simply doesn't have time to prepare the party, and she doesn't trust the two girls to do it alone. But Bibi and Tina don't give up that easily. They are secretly planning a surprise party! Unfortunately something goes wrong.

Bibi, Tina and Alex discover a couple of raccoons at the Mill Stream, who follow them to the Martins Farm. They do all sorts of nonsense there. Nevertheless, the forester asks Ms. Martin to house the animals until he knows where they came from. Bibi and Tina now need to take care of them. But that is not so easy!

Bibi and Tina are really looking forward to the Halloween party at the youth club. But Alex declines. His father leaves unexpectedly and he has to both look after the castle and his cousin. The children simply decide to celebrate all together in the castle. Suddenly, a spooky headless knight appears!

This summer is really hot, everyone is short tempered. When Bibi, Tina, Alex and Freddy find an old treasure map, they get into an argument about it. Because the boys want to look for the treasure on their own. But Bibi and Tina won't put up with that. A race for the treasure begins: boys against girls. Which team will win?

Nowhere is as beautiful as Martins Farm," assures Bibi, who loves spending summer vacations at the idyllic ranch with her best friend, Tina, and her beloved mare, Sabrina! But a shadow is cast over their summer fun when a big money contractor, Jake Overland, shows up on the farm. Convinced he has finally found the right place to build his luxury holiday resort, Count Falko von Falkenstein refuses to sell him the property, until a mysterious document suddenly appears. The clock is ticking a...

Bibi and Tina are happy: the beaver family at the Mill Stream has had offspring. But there are problems at the Mill Farm. Everything is completely submerged. For the Mill Farm Farmer it is clear that the beavers are to blame and have to go! The new forest ranger also wants to relocate the animals. Bibi and Tina are determined to prevent this.

It's winter in Falkenstein, there's snow everywhere. When Mikosch comes to visit, to everyone's surprise, he brings skis with him. He shows Bibi, Tina and Alex how to be pulled by horses. "Skijoring" is great fun for everyone. But then suddenly a blizzard hits Falkenstein!

Bibi and Tina are given the chance to do an internship with Falkenstein's vet, Dr. Robert Squirrel. Things go well at first, but then the girls begin to slack off and the vet sends them back home. But when he finds himself in a tight spot, the girls want to prove that they can be helpful after all. Will they be able to?

Bibi, Tina, and Alex are looking forward to the Falkenstein endurance race, and plan to enter as a team. Then Elisabeth, whose mother is a friend of the Count's, pays them a surprise visit. She wants to compete in the race too, but she can't ride alone. She decides to win Alexander for herself instead. Will she succeed?

Bibi and Tina want to enter the big Falkenstein team jumping contest, but with the Hatmaker brothers participating, they've got some tough competition. Still, the girls think they might have a chance if they train really hard, and luckily Tina's brother Roger agrees to help. Everything's going great, until suddenly Roger goes missing!