'The Enemy' is about a Japanese surgeon whose name is Sadao. He studied in America and married a Japanese girl. World War II began at that time. All the doctors were to take responsibility for the Japanese army. However, Sadao managed to stay back with an old general. As the old general was weak, he needed Sadao's help. However, we learn how an America Navy man found his way into Sadao’s life.  Sadao offered medical help to a soldier who was not well at all.
Sadao was not willing to help the enemy, but he did it anyway. He also knew the danger he has fallen into by helping the enemy. Due to this, Sadao conspired to kill the American soldier in his sleep. However, Sadao decides to save him because of sympathy, compassion, humanity, and brotherhood.