Beth Parish is an eight-year-old girl blessed with a marigold flower fairy spirit. With her mentor, a monarch butterfly fairy, Marigold learns how to be a fairy, and discovers things like the Fairy Handbook, the vast variety of fairy wands, how to create fairy lights, the purpose of fairies, what gnomes do, and the three things gremlins are afraid of. She attends fairy circle and meets her new friends —Thistle, Dragonfly, and Firefly. They discover that the brownies, keepers of the Feather of Hope, which is the source of all hope on Earth, need their help. Marigold must enlist the aid of her dachshund, Peanut, in a daring mission to rescue the Feather of Hope from a house occupied by dangerous gremlins.