For the first time ever, Great Grandfather has no explanation for Juan and Sophia when the medallion reveals an ancient stonemason at work. He is as mystified as they are about what it means.Prompted by the twins, he finally begins to reveal his own history with the strange piece of silver, an odyssey that involves adventure and peril in places as far-away as Africa. Juan and Sophia are awestruck to discover a courageous and heroic side of their unassuming relative.Then, a news flash from South America sets in motion a series of events that will change their lives forever.