Evil Aunt Lily stole the Bliss family's magical Cookery Booke, and now Rosemary Bliss swears to beat Aunt Lily in an international baking contest to win the prize book back. The only problem is Lily has the book, which has magical recipes, and her magical ingredients give her an edge in any contest. The only way to win against a magic recipe is to find one of their own, and so Rose, her grandfather, a talking cat and mouse, and her brothers, find themselves racing through the streets of Paris to gather the ingredients they need to take Aunt Lily down.