Shark princesses Kitana and Mack are back, just in time to attend the ocean's first Surfin' Sharks competition! Surfing is Mack's favourite sport, and he's been working really hard on his routine. But after a high-flying performance, he becomes discouraged once he sees a more talented shark and decides to quit for good. But after some helpful encouragement from Kitana and a young shark who admires his skills, Mack learns that surfing isn't all about winning or losing - it's about having fun!