During his birthday's celebration, Prince Siegfried must choose a bride. Trying to escape reality, he dreams of a perfect love. His tutor tries to bring him down to Earth and reminds him of his duties. On a dreamlike getaway, the Prince meets Odette, a princess who has been transformed into a swan by the powerful sorcerer Rothbart.
Only true love can break the spell. Captivated, Siegfried promises Odette to save her and invites her to his party. To trap the Prince, the sorcerer sends his daughter Odile, disguised as Odette, to seduce him.