Based on true events, "The Bay of Spies" follows Franz Neumann, a young Nazi Abwehr officer, who discovers that his real father was Polish. Using this information to his advantage Franz becomes a spy for the Allies with the code name Got’ His task is to obtain information about the activities of the German Navy, the Kriegsmarine and report back to the allies. Using his charm and charisma, Franz manipulates the men he gets close to, makes women fall in love with him, and snakes his way into the German elite.

A Polish teacher moves to a provincial town and gets involved in investigating the brutal murder of a high school girl. He learns more and more about the mysteries of this murder, revealing corruption and fraud among local elites.