Everybody is looking forward to the All Hallows Eve costume ball, especially Amber. However, this year, everybody has to make the costumes themselves, and Amber doesn't know how to make a costume. When she sees Sofia's beautiful swan costume, she gets jealous and decides to go to Cedric and asks him to let her use a magic spell to make her costume. The spell makes Amber a wonderful butterfly costume, and she wins the costume contest. But the costume won't come off, and it turns out that it's actually real. Cedric says that the only way to turn Amber back to her true form is with Sofia's amulet. When Amber tries to take Sofia's amulet, she tells her sister what she did, and Sofia is happy to let Amber have the amulet, but knowing what she did was wrong, Amber refuses to take the amulet. Amber admits to the fairies that she cheated in the costume contest by using magic to make her costume. The fairies fix Amber, and she has to return her unfairly won trophy.