Hidden Treasure of the Sax-Zim Bog

Leo and his little sister, Lucy, are going on a hiking adventure with their Grandma Dana and her mini dachshund, Tilly Lu, along the Saint Louis River. They're excited to play "e;I spy"e; and see what treasures they can find. When Leo spots an old bottle floating in the river, they pull it out and discover that it contains a map and three stones, each with a special word. The map is full of hints ...