What is behind the ancient Lodge of Saint John? A two-century-old mystery, hidden by the highest characters of the South American revolution; San Martín, Bolívar, and others, all connected by the Masonic Order. Is that secret so powerful to have people that could kill to protect it? Roberto Bruno, a freemason, recently raised to the Master Mason degree is going to find it, with the help of his life-long best friend, Jaime. Are they going to be able to uncover the lost secret? What lies under the ancient Lodge of Saint John?