Exciting adventure awaits two cousins when they accidentally stumble upon a hidden magical Sandcastle! Before either boy can say "Treasure Chest," they are swept into this new world by a mysterious artifact, shrinking them to the size of local sand crabs! Without giving them any time to understand what has happened, a new foe, with his own magical "Object of Power," launches a sudden attack. To the boy's surprise and relief, the door of the Sandcastle swings open just in time, revealing an amazing underground world, including an unexpected friend and ally, saving the day!
Once inside the Sandcastle itself, the cousins quickly make new friends (and formidable enemies) amongst the various creatures that live on this enchanted beach. Through battles and ancient puzzles, they journey through this underground realm, only to learn that what has been taught them in their history books - might be very different in real life - including the legends of local pirates, and other events related to Galveston Island. The journey through the Sandcastle's domain reveals treasure both physical and spiritual. Join the boys as they unknowingly become an important part of the age-old, War of the Sky-Lords.