Sobinski and his fellows meets the Polish resistance leader Professor Siletsky. Siletsky will return to Warsaw soon, and the men give him messages for their loved ones. However, Sobinski becomes suspicious when Siletsky doesn't know of Maria or Tura. The Allies realize that Siletsky has the identity of the relatives of Polish airmen in the RAF, against whom reprisals can be taken. Sobinski flies back to warn Maria, however Siletsky has Maria brought to him by German soldiers. He invites Maria to dinner, hoping to recruit her as a spy. Just before she arrives home, Tura returns and finds Sobinski in his bed. Maria and Sobinski try to figure out what to do about Siletsky, while Tura tries to figure out what is going on with his wife and the pilot. Tura proclaims that he will kill Siletsky.