The mystery surrounding Tancredo Neves's death are revealed 30 years after his death. 'O Paciente' transports us to the last days of the recently elected president and relives the anguish, fear and anxiousness of the politician about his destiny as president and the future of the country. Based on the book with his namesake by the historian Luis Mir, the film reveals the behind the scene medical reports of the story that rocked Brazilian politics and changed the destiny of the country.