Left penniless in eighteenth century England, fourteen-year-old Nathan Gull and his mousy sister Maud accompany Tamo, the son of a notorious pirate, to his homeland of Madagascar where they are all changed by their encounter with Tamo's dangerous past.
Riley, Uncle Max, Aunt Martha, and Cousin Alice travel to Madagascar, where they encounter a variety of unique animals, plants, and habitats while searching for the elusive aye-aye, a rare lemur once thought to be extinct.