For 30 years, the canon and astronomer Nicolaus Copernicus has known that the earth revolves around the sun. A revolution in the late Middle Ages! But the polymath was plagued with doubts: his mathematical calculations did not match his astronomical observa- tions. Even worse: his findings contradict the bibli- cal story of creation. Copernicus struggles with him- self and with his faith. Then the Gdansk merchant‘s daughter Anna Schilling enters his life and will chan- ge his world.