The powerful evil wizard Tarabas gets knowledge about a prophecy that a king's child will defeat him. So he sends out his army of dead soldiers to kidnap all royal children. When the soldiers attack Fantaghiro's castle to steal the babies of her sisters the battle seems to be lost until she discovers that water turns the unvulnerable soldiers into stone. Romualdo leads the aggressors to a near river and destroys one after the other until he finally falls into the river himself and is turned into stone by the poisoned water. Because nobody is able to revive him Fantaghiro decides to search for Tarabas to force him to help her.

During archery in a wood Princess Fantaghiro is discovered by the hostile king's son Romualdo. He is able to take a short look at her before she can escape and immediately falls in love with the unknown beauty. When Romulado challenges her father for a duel to end the bloody war between their people Fantaghiro is send out to fight him due to a prophecy. As Romualdo sees her dressed as a man he believes to recognize his beloved. So he tries everything to discover wether she is a man or a woman and prevent the duel. Fantaghiro starts to fall in love with him, too, but her sense of duty is strong. Will love bring them together or will it end as a tragedy?