A trip to the beach starts out as fun until best-friends Leah Criss, Sara Cross, and Aimee Applesauce begin to get clues to a mystery- from a shark! Is Dad playing a trick on them? Who is the pretty girl? The surfer? Is the lifeguard in on the practical joke? Or is it no joke at all? Put on your swimsuit and join the girls as they try to solve the puzzle of the Shark Surfer Girl!