August, 1943. Fourteen-year-old Massimo is all alone. Newly orphaned and fleeing from Rome after surviving the American bombing raid that killed his parents, Massimo is attacked by thugs and finds himself bloodied at the base of the Montecassino. It is there in the Benedictine abbey's shadow that a charismatic and cryptic man calling himself Pietro Houdini, the self-proclaimed 'Master Artist and confidante of the Vatican,' rescues Massimo and brings him up the mountain to serve as his assistant in preserving the treasures that lay within the monastery walls. But can Massimo believe what Pietro is saying, particularly when Massimo has secrets too? Who is this extraordinary man? When it becomes evident that Montecassino will soon become the front line in the war, Pietro Houdini and Massimo execute a plan to smuggle three priceless Titian paintings to safety down the mountain.