Bibi Blocksberg wants to take a riding vacation at Martin's Farm, where she meets Tina. The Martinshof is economically run down after the death of Tina's father, because Tina's mother lacks the money for necessary repairs. Therefore, no more guests come. In addition, the count demands rent for the farm, which Tina's mother can no longer afford. Bibi's dream comes true: holidays on a horse farm! But when she arrives, she learns that the Martin family can no longer afford the lease. The farm should be cleared and all animals sold. Tina Martin is in Bibi's age. The two girls are best friends. Together they try to save the horse farm: An exciting story with a bit of witchcraft, a little love, a lot of fun and many, many horse scenes!