Ahiru is a timid and sweet duck who wishes nothing more than to help a sad and lonely prince she encounters one day. She is given the opportunity to do so by a mysterious man who changes her into an awkward ballet student and gives her the task of helping the sorrowful prince find the missing pieces of his heart. Along with her new human identity, Ahiru is given the power to become Princess Tutu, a graceful ballerina who battles the malevolent raven and eases pain and suffering with her magical dancing.