A group of curious kids sets out for a fun day at the beach, but when a sudden fog rolls in, they find themselves lost and cut off from the path back home. As they search for a way out, they stumble upon mysterious objects, hidden messages in seashells, and footprints that vanish into the sand. With teamwork, bravery, and a sharp eye for clues, they unravel the beach’s secrets—leading them to an old forgotten cave and a map that just might be their ticket home. But time is running out, and the tide is rising...