7-year-old Anna is having trouble sleeping at night. She forgot her favorite doll, Sophie, at her family's summer cottage, and Anna's parents won't drive all the way to the house to retrieve the doll. Just as Anna is wondering if Sophie feels lonely, she suddenly hears a strange sound. Anna is visited by a small yellow aeroplane named Zanzibar along with its crew: Captain Bimse and the co-pilot Goggeletten. With her trusted teddy bear Mr. Johnson in tow, Anna embarks on a magical rescue mission with Captain Bimse and Goggeletten to save Sophie.