Martin Luther (Maximilian Brückner) and his 95 theses against the indulgence trade triggered a political quake in 1517, thanks also to the book printing. It is true that the Church excommunicated Luther, but the Reformation can no longer be stopped when he does not revoke his theses even before the Emperor. Nevertheless, Luther struggles for the right path, especially with his companion Thomas Müntzer (Jan Lennart Krauter). He also wants to enforce a more equitable world with revolutionary means against the sovereign, while Luther rejects all violence. Ultimately, this dispute leads to the devastating Battle of Frankenhausen, to the death of thousands of peasants and to Thomas Müntzer's execution.