Jean is a very unusual mermaid with superpowers and a talent for making blue jeans, magical jeans of course. With the help of her surfer friend Dude, she makes her dream, of opening a store of her own at the mall, where she can sell her splashing fashion creations with her underwater friends, come true. With pirates sailing the seas and casting their nets to catch her underwater friends whales, sharks, eels and mermaids too, Jean has her work cut out for her on this epic adventure. But with her superpowers, she is able to outwit even the saltiest of sea captains, his crew of pirates, and, Polly, his parrot.