Girls from the Horse Farm

Though Bubi, a white Welsh pony, has only lived at the horse farm for a few weeks, he is already causing several problems for friends Tine, Ina, and Alex. While the messes he makes are annoying to clean up, and his gluttonous appetite can be a bit of a bother, the girls would be happy to ignore his flaws, if only they could find him. The pony seems skilled at disappearing, and locating him may be the least of their problems, if they cannot figure out how he keeps escaping.

With Lilian still caring for her young foul, Alex borrows the farm's horse Gilda, whenever she goes riding. One afternoon, Tine, Ina, and Alex take the horses to the ruins of a nearby castle. The girls get caught in a storm that spooks all the horses, but sends the skittish Gilda into a panic. When she manages to escape, they are sick with worry about the borrowed horse. After all, she is all alone, in unfamiliar surroundings, in the middle of a terrible thunderstorm.

Something is amiss at the horse farm! During the night, someone broke in completely undetected and escaped with two very expensive saddles. The thief left no trace of a forced entry, and no tracks that anyone can find. Since Tine's cousin Gerrit is spending the day with Tine, Ina, and Alex, he offers to help investigate the pilfered items. Can the children locate the items before the thief sells them, or will they find themselves trapped in dangerous situation?