An old mansion and a legend of hidden gold.Twelve-year-old best friends Samantha and Ally are thrilled to spend summer vacation at Hollow Inn, deep in the mountains of Montana. With trails, a lake, and even an old mine, adventure waits around every corner.But things are going poorly for the innkeepers, Sam's Aunt and Uncle. Ghostly sightings spook the guests and fuel old stories of hauntings and revenge. The girls are determined to solve the mystery and save the business, except it turns out they aren't the only ones on a quest.After finding a clue that makes them believe rumors of a lost treasure, they embark on a journey that will challenge both their wits and friendship.Will they solve a decades-old mystery, or become another whisper in the legend of Hollow Inn?

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