Little Scallop, a princess of the Mollusk tribe, longs to have a real adventure. So late one night, she and her mermaid friends sneak off to dive for pearls. They run into a fierce storm and a strange ship sailed by men who would love to capture a mermaid..
While investigating the strange behavior of the once-peaceful mermaids, the Lost Boys battle their old nemesis, Captain Hook, whose evil plan threatens to destroy the Mollusk village and change life on Neverland Island forever.