Set in the 1840s, the story follows Maria Merryweather, a 13-year-old orphan on her journey to the mysterious Moonacre Manor. There she finds herself in a crumbling house of secrets and mystery, in a world caught up in time. Maria discovers that she is the last Moon Princess. and she has only until the next full moon to undo the misdeeds of her ancestors and save the Moonacre estate from disappearing forever. Although she is aided by a stable of wonderful characters and magical beasts, it is only by self-sacrifice and perseverance that she will be able to reunite lost loves and warring families and bring peace to the magical world of Moonacre.