As a young man, producer Jesse Cox learned that his grandparents, Sydney and Lesley Piddington, had been enormously popular radio performers of the 1950s. They were mentalists, wowing listeners with their uncanny ability to read each other’s minds. Sixty years later, a question remains: how did they do it? No matter how much Jesse asks his grandmother, his father, even other magicians, he can’t seem to find the answer. And soon another question presents itself: should he, should we open that black box and look inside if that means losing the magic?