After accidentally smashing her mother's prized china dog, little
London girl Jenny Quin leaves her mother a note and sets off from home to make the money to buy a new one by travelling with the family of her friend, Susie Harris, as they set off to go
hop picking in Kent. At the station, Jenny joins the special hop-pickers' train to
Goudhurst in
Kent, but after failing to join up with the Harris family, she is invited to join Sam Hines and his family. After the first day of hop picking, Sam takes her with him to an antiques shop in Goudhurst where she sees a china dog just like her mother's. Sam lends her the money to buy it. Meanwhile, when Jenny's attempt to send a letter to her parents telling them where she is fails to reach them, her parents report her as missing to the police. When they eventually track her down at the hop-pickers' camp, her parents set out to go to her. Mr. and Mrs. Quin arrive during a hop wedding, when all are distracted, and the dog is stolen by two local children – the Reilly boys – untidy
Artful Dodger style characters who disparagingly call the hop-pickers "hoppers". Jenny chases after the two boys into an old windmill, but they trick her and seal her in the upper area by taking away the ladder. When lightning strikes the old mill and it catches fire, the Reilly boys run off, but when Pat Reilly sees the mill on fire he returns to help Jenny escape, but she leaves the china dog inside. Ned re-enters the burning mill to rescue the dog and returns it to Jenny, but she doesn't even say "Thank you", so he grabs the hose from the fire engine which has attended to extinguish the fire and squirts water over Jenny and her parents and friends. ==Cast==