Together, Marina, Aqua and Oceana are the Petticoat Pirates!Living aboard their ship in the Periwinkle Lagoon, they are surrounded by the magical high seas which hold all sorts of adventures.When the other pirates of the Lagoon are struck by a mysterious curse, the girls must travel in search of sea fairies to find a cure. But to get there they'll have to face one of their greatest fears and steer their ship straight into a whirlpool!Can they be brave enough to save their friends?