Mason's parents will not allow him to get into the ocean and swim because they believe he is too small for the big ocean. By the end of Mason's whirlwind day at the beach-he is placed in his magic box for the night. In his magic box, Mason dreams of going swimming in the ocean. Unfortunately, the magic box takes Mason far from the beach and he is lost in the big ocean until he meets a shark. The shark promise to help Mason get back to the beach but instead, he swallows Mason and his magic box. Mason's quick wit allows him to escape the belly of the shark and reunite with his family. Mason learns through this experience that his parents know best and that he should trust their decisions.