It's summer vacation, and Sassy and her family are headed to Florida to visit Grammy for her birthday. A huge celebration is planned at Grammy's beach house. Sassy can't wait! But the weather report says a hurricane is swirling in the Atlantic, and could be coming right toward Grammy's town. So much for family fun-- everyone's too busy boarding up their houses and stocking up on food. To make matters worse, the local sea turtles' lives are threatened, there's no electricity, stores are closed, and there's no birthday cake. but thanks to Sassy's sparkle sack, time spent in Florida turns into an unforgettable celebration that is a birthday party like no other!