A young Scottish exchange student in the U.S. has a magical gift: she can talk to animals. One day, her best friend, a dolphin, tells her about a mysterious pirate ship. The ship shouldn't exist. The pirates want the girl, believing her too be a mermaid. When they can't have her they take her little sister. On a quest to find her sister, she discovers a hidden magical world full of new mysteries. Will she find her sister in time or will the magical world prove too much?