What is the third secret ? It is rumoured to be a prediction so shocking that it has been locked away for over 80 years. But when it is finally revealed in 2000, it seems puzzling, less than sensational. Is something being held back? Could this be what is drawing Pope Clement XV to the Vatican archive, night after sleepless night? When Father Colin Michener is sent on a secret mission to the highlands of Romania, he is pitched into a vortex f suspicion, deceit, murder to face the very thing that has so distresses the Pope - and to unravel a mystery that will shake the world.