Back at the palace, Derek was still dancing with the fake Odette.
"Something about you seems… I don't know, different." he said to her.
"Don't worry." replied the fake Odette as she pulled out the locket. "After tonight, everything will be perfect."
"Yes, yes of course." said Derek as he put the locket around her neck.
"Rogers," he called out. "I want to make an announcement. Stop the music."
Meanwhile, Odette and Gonzo were flying as fast as they could when they spotted Derek's castle.
"There it is!" Odette said to Gonzo. "Come on!"
Once they got there, they flew to the window where Derek was facing the crowd...with the fake Odette!
"Kings and queens…" he began. "Ladies and gentlemen… Mother. I have an announcement to make. Today, I have found my bride."
"No, Derek! No!" Odette cried out from outside the ballroom. "It's a trick!
But Derek hardly noticed.
"I present her to you as the future queen of our fair kingdom." he went on. "And as proof of my love for her, I make a vow to break all vows, a vow stronger than all the powers of the earth,"
Odette and Gonzo flew everywhere to find a way inside, but to no avail.
"Before you and before the whole world," they could hear Derek say from outside, "I make a vow of everlasting love—to Odette."
Pain and grief ran through Odette as she began to plummet down.
"Odette!" cried Gonzo.
The crowd cheered wildly for Derek's vow when all of a sudden, the ballroom went dark as Rothbart bursted though the door.
"Hello, little prince." he said to Derek who demanded. "Who are you and what are you doing here?"
"Just though I drop by to see you pledge your love to another." replied Rothbart.
"What are you talking about?" asked Derek. "This is Odette."
"Oh, no," sneered Rothbart. "The real Odette...is mine."
Derek suddenly realized who this man was.
"You have no power here!" he shouted. "I've already made a vow…a vow of everlasting love."
Rothbart laughed. "You made a vow, all right, a vow of everlasting...death!"
With that, he blasted his evil magic at the fake Odette.
"No!" cried Derek.
As he hurried over to Odette, however, he was shocked to see that his true love was actually Rothbart's pet animal.
"Now your foolish mistake has driven Odette away." said the sorcerer as he pointed to a swan flying in the night sky.
"What?" said Derek as he looked up.
He now realized he made a mistake!