Hildegarde Grahame leaves the city for a restorative summer in Maine with her wise cousin Wealthy, bringing along her formerly invalid friend Rose. Surrounded by peaceful river views, leafy orchards, and eccentric local characters like the melancholy Jeremiah, the girls embark on a series of wholesome adventures. Hildegarde rows the river, discovers hidden fern-filled coves, and learns to appreciate the simple wonders of nature that she previously overlooked. The visit takes a deeper emotional turn when the girls encounter old Galusha Pennypacker, a lonely miser living in squalor, whom they gently befriend with food and kindness.
This act of charity unlocks a touching story from the past about Pennypacker's aunt, a tragic figure known as the Queen of Sheba. The arrival of Hildegarde's young friend Bubble adds youthful energy to the household, while the establishment of a Country Home for sick children from Fairtown transforms the estate into a haven of joy. Throughout the summer, Hildegarde grows from a flighty city girl into a thoughtful, compassionate young woman, finding true happiness in bringing comfort to others. The narrative gently portrays the healing power of love, friendship, and connection with the natural world, leaving the reader with a lasting sense of peace.