In 1972 while reporter Brian Allen Bennett visits a charming villa in Tuscany, Italy, he receives a gift: a Bible from the mysterious caretaker. It contains two cryptic documents: a birth certificate dated April 20, 1889, and a letter from a monk verifying the discovery of a baby on the monastery doorstep that same day. Bennett begins to investigate and learns the sickly infant abandoned by its father was the twin brother of Adolf Hitler. Even more astoundingly, he grew up to be a monk. Bennett spends the next six months searching for more clues to Hitler’s brother’s past while being relentlessly pursued by Friends of the Third Reich, an infamous pro-Nazi group. With the caretaker’s help, Bennett eventually uncovers an incredible story of deception and intrigue swirling around the greatest secret of the twentieth century. It all begins at Hagenmünster Monastery, Austria, in 1939 with Heinrich Glossen: the man who holds the key to the closely guarded Nazi secret.