Bibi, Tina, and Alex have become enthusiastic members of Falkenstein's volunteer youth fire brigade. The forester, Mr. Greenfinch, teaches them how to put out fires and conduct search and rescue. Unfortunately Count Falko has other plans for his son and spoils the whole thing for everyone. What was fun suddenly gets serious!

Alexander is getting ready for a dressage tournament at Gripgood Manor. Bibi and Tina are helping him train. But the date on the invitation was wrong, and the event is actually tomorrow. Since Alexander has lots of important appointments that day, Bibi and Tina agree to cover for him. Then they make an incredible discovery!

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 and Tina win a spa weekend at a luxury hotel for Mrs. Martin. Tina's mother is hesitant to accept, but she decides she really could use some time off. Bibi, Tina, and Roger can take care of Martin's Farm while she's away.

Mrs. Martin is using her grandmother's old recipe book to bake gingerbread cookies shaped like horses. Bibi and Tina take them to the Falkenstein Christmas Market, where they sell fast. But then someone breaks into the stall at night and steals all the merchandise. Bibi and Tina think they might know who the culprit is.

Bibi and Tina are curious when they see a black mare standing in the front yard at Dr. Robert Squirrel's house. The vet explains that the horse has psychological trauma from an accident. The owner left it to him, but he doesn't have the time to look after it. Of course Bibi and Tina jump in, but can they help "Blackbird"?

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!

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 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.

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.

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?