Saint Nicholas has gone back to Spain for a year. In the meantime, Winky takes care of his horse Amerigo. She takes riding lessons on a pony called Naf-Naf, and Aunty Cor and Uncle Siem teach her everything they know about horse grooming. Winky loves riding Naf-Naf, but she very much wants to ride Amerigo, although it is too big for her. At home, there is a surprise for Winky: her mother is pregnant. Winky likes the idea of getting a baby sister or brother, but she also feels a bit awkward about it. One day, when there is no one else at the farm, Winky does something naughty and sneaky, with terrible consequences. Amerigo escapes... Saint Nicholas is already on his way to Holland…