Feel the sand between your toes and listen to the crashing waves. The Bobbsey family is heading to the beautiful coastal town of Ocean Cliff to visit their lively cousin Dorothy. For Bert, Nan, Flossie, and Freddie, the wide open beach is a giant playground. The children spend their sunny days collecting colorful seashells, building massive sandcastles, and splashing in the salty ocean water while eagerly preparing for the town's spectacular water carnival. But the sunny beach vacation takes a dramatic turn when a massive, terrifying storm blows in from the sea. As the dark clouds roll in, the siblings witness a shocking shipwreck just off the coast. In the chaotic aftermath of the storm, a valuable necklace goes missing, and a brave sailor suddenly vanishes without a trace. Follow the clever twins as they launch a thrilling search along the rocky shoreline and the busy wooden boardwalk. You will race to piece together the scattered clues, braving the crashing surf to solve the mystery and help those in need. This classic seaside adventure perfectly captures the magic of summer vacation while delivering a suspenseful puzzle that will keep you guessing until the very end.