At the start of Albert's enchanting third Beatrix Potter mystery set in England's Lake District, Miss Potter discovers that her beloved Hill Top Farm is overrun with rats. In the nearby town of Far Sawrey, mild-mannered vicar Samuel Sackett also finds himself plagued with unwanted visitors: a cousin and his wife who have long overstayed their welcome.

There are also rumors that a mysterious Mr. Richardson plans to build holiday villas on the shores of Lake Windermere, and he appears to be in league with Mrs. Kittredge, the beautiful new wife of the master of Raven Hall. Ridley Rattail, one of Hill Top Farm's resident rats, contrives to rid the farm of its unwanted rodents, but when his program backfires, he must seek a way to redeem the situation. Rich descriptions of the countryside and the imaginative rendering of the animal characters make this gentle tale a delight from start to finish.