Welcome back to beautiful Paradise Island for more mysteries, sea ghosts and spilled smoothies! Our gang believes they've got the ghost problem well and truly busted. But just when they thought it was time to settle down and enjoy a quiet mango smoothie in the cafe, things start spiralling out of control all over again...and it's not Tai's hair. Time for more trouble in Paradise! With the coral seal in place, the kids are safe from Ragnar and party hard. Tai enjoys his Seaborn status but is rocked when his powers fail. New girl Natasha arrives to work with Peter in the lab. But driven by curiosity she accidentally breaks the seal and the pollution is released, as well as the sea ghosts...