When Alex's family goes on a sailing trip, they're blown off course and discover a mysterious island that's not marked on the map. As they explore the island, they uncover ancient ruins, mysterious symbols, and hidden passageways. Alex befriends a magical creature named Luna, and together they embark on a treasure hunt, solving puzzles and overcoming obstacles. Along the way, Alex learns valuable lessons about friendship, teamwork, and the true meaning of treasure. With Luna's help, Alex uncovers the island's secrets and discovers the magic that lies within.