"Swan Lake" is about a prince named Siegfried. He falls in love with the Swan princess, Odette. She is a swan by day, but a young woman at night. She is under a magic spell that can only be broken by a man who will make a promise to love her for all time. Siegfried makes the promise. He is tricked though by the magician who cast the spell. The ballet ends with the deaths of Siegfried and Odette.