Alexandria is a bright and imaginative 3-year-old who loves pink, princess dresses, and her loyal French bulldog, Lola. On her birthday trip to Princessland, Alexandria wishes harder than ever to become a mermaid princess. The very next day, her first visit to the beach turns magical-her legs shimmer with scales, and she discovers an enchanting underwater world filled with dolphins, turtles, coral castles, and even another mermaid!

Was it just a dream? Or has Alexandria's greatest wish come true? With Lola by her side, she learns that magic can happen when you believe in your dreams.