The Secret Adversary: during the war, ordinary people may encounter unusual things to make all the difference. In May 1915, the RMS Lusitania near Ireland was hit by the German torpedo for the World War I, and passengers fled for their lives in the chaotic upsurge. A strange British man quietly gives important papers to a young American woman as she is ready to aboard the lifeboat. He repeatedly stressed that there is a file related to the future of Britain and America, and he suspected that he has been tracked by the enemy. He asked her to take good care of this parcel, and informed her contact way after surviving. After brief contact, both them tried to survive.