Spring of 1794, Poland is in a state of unrest. General Tadeusz ‘Kos’ Kościuszko returns to the country, planning to ignite an uprising against the Russians by mobilising Polish gentry and peasants. He is accompanied by his faithful friend and former slave, Domingo. Kościuszko is being tracked down by a merciless Russian cavalry captain, Dunin, who wants to do whatever it takes to capture the general before he starts a national revolt.
In a monastery cut off from the world, the monks run a clinic for the possessed. One day, a young policeman Marek comes to the convent. Posing as a clergyman, he penetrates monastic life and tries to explain the recent, mysterious disappearance of several tormented inmates. It turns out, however, that there is no way out of the monastery.
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.