Once upon a time in Halloweentown, a little boy woke up in a castle fit for a king. He was alone with the caretakers. His parents were nowhere to be found as usual. He wondered what more important things could they have to do on such a very special time in his life. The day has come for him to go trick r treating... again... with no parents. His maid had laid out his costume for him. Tonight, he will be a cat. But a cat, he will transform into at the precise twelfth hit after midnight. Little did he know that his parents were mice, hiding from him safely in the dungeon.

They became mice on Halloween's Eve. The END!