When his father is arrested for printing a forbidden letter written by the controversial reformer Martin Luther, 12-year ogo Storm escaapes with the original. On the run from the authorities, Storm finds unexpected help from Maria, a young gorl who lives in the city’s underground tunnels. I a race against time, Storm tries to save his father from execution and get the letter into safe hands. But whom can he trust? What starts out as a fearful flight, becomes a bold fight for freedom.