Can Freddie's superpowers help him catch a beach monster?

Freddie takes his first trip to the beach, where his superpowered shoes make him bounce on the sand. While Freddie's mom hangs out with her boyfriend, David, and gets to know his family, Freddie investigates the giant monster tracks that mysteriously appear on the beach. When David's sister and baby niece disappear, can Freddie find them before the monster does?