Robert McCall finds himself at home in Southern Italy but he discovers his friends are under the control of local crime bosses. As events turn deadly, McCall knows what he has to do: become his friends' protector by taking on the mafia.
It is the end of World War I and the young Italian soldiers are making their way back to San Giovanni Rotondo, a land of poverty, with a tradition of violence and submission to the iron-clad rule of the church and its wealthy landowners. Families are desperate, the men are broken, albeit victorious. Padre Pio also arrives, at a remote Capuchin monastery, to begin his ministry, evoking an aura of charisma, saintliness and epic visions of Jesus, Mary and the Devil himself. The eve of the first free elections in Italy sets the stage for a massacre with a metaphorical dimension: an apocalyptic event that changes the course of history.
Called to Rome to stop an imminent terrorist bombing, a soldier desperately seeks news of his imprisoned brother — a rebel with knowledge that could thwart the attack. Navigating the capital's darkened streets, he races to a series of ominous encounters to keep the Vatican from being blown to bits.