Eager to grow up, Abby has been planning for her Sweet 16th birthday ever since she was a little girl. Abby has a list of secret wishes she wants to come true. When the big day finally arrives, she excitedly adds her 16th and final wish to the secret wish list she's been keeping. Then begins the first of many unusual occurrences that day, each including visits from a peculiar woman, Celeste, whose first appearance is to deliver a mysterious box of 16 birthday candles.