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.

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?

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 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.

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!

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.

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!

Ghosts in the Falkenstein Forest? Bibi and Tina make fun of these rumors with Alex and Freddy and keep scaring each other for fun during a camping trip. But then strange things happen on the Martins Farm: things disappear from the stable, strange noises can be heard. Is it haunted?

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, Tina, and Alex are in Hungary visiting Szendrö Manor to celebrate the birthday of Mikosh's horse Baboshko, but they're unable to get into a festive mood. It's winter, and there's a wolf roaming about looking for food. When the locals get ready to hunt down the poor creature, the friends are horrified, and they try to help him.

Bibi and Tina can hardly believe it: Freddy has fallen in love with Amélie, one of the guests at Martin's Farm. In order to be around her, he even signs up for riding lessons. But Amélie only has eyes for the horses, and all of Freddy's efforts are in vain. His only chance is to ask Bibi and Tina for help.

While out on a ride, Bibi and Tina meet a movie director who plans to shoot a western in the area. Soon the two girls are actively involved, Amadeus and Sabrina are movie stars, and Martin's Farm is housing the film crew. Bibi and Tina find out the hard way that shooting a film is exhausting and full of surprises.