Portugal. 1917. Three shepherd children witness a vision of the Blessed Lady of Fátima. The Lady offers three prophecies, but later the Church only acknowledges two . . . and hides the final one in a vault, terrified of its power to end the world.

Father Michael Dominic receives a copy of an unpublished exposé written by his colleague, Father Jonah Barlow. Barlow claims to know the Third Secret Prophecy and wrote his book to reveal it to the faithful. But tragedy strikes soon after when Father Barlow falls to his death, leaving bewildered colleagues in his wake.

Father Dominic suspects Barlow’s demise is due to foul play, but he only has one piece of evidence—the original book manuscript is missing from the crime scene. The provocative tome sparks an international chase to discover the truth, with some driven by greed and others intent on concealing the sacred prophecy forever.

Can Father Dominic and his friends unearth the saint’s words and redeem Barlow’s legacy? Or will his investigation unleash a dark force capable of destroying everything and everyone he cares for?