Andi and Tony find themselves reduced in size to just nine inches tall. Mom and Dad have disappeared. What's happening? Andi believes they must hike up the mountain behind their home, up to the monument known as the 'Arch, ' to solve the mystery. Being small makes everything so different! Mom's garden, the fields, the woods, once so familiar, are transformed into a world of magic and danger. Along the way, fun, friends, and surprises await. Brother and sister will need all of their courage and wits on their quest to save themselves, their folks, and even the planet. Join them on this fantastic adventure filled with laughter and excitement!