Having become an orphan after a Nazi patrolling, the small Trof has to live alone and illegally in the many rooms of the apostolic palaces in the Vatican and underground in an unknown and inaccessible maze of tunnels and secret passages. For prelates, cardinals and even the Pope, the impertinent Trof becomes a disturbing presence, a goblin with whom sooner or later it is necessary to come to terms. Found and sent to a seminary, he comes to know his mother was a Jew lost to the Holocaust. He immediately starts the search to find her from the Dolomites to Provence, and in Spain from the Way of St. James to the magical plateau of the Sierra de Guara. Strange events lead him back to the Vatican, where he is involved in the intrigues of power next to the pontiff. He can discover the truth about the tragic death of his family: all the doubts disappear and Trof comes to know that his life is deeply entwined with the Pope's and to the Church.