An American-trained Japanese surgeon working in Japan during World War II, pulls a wounded American sailor, presumably an escaped POW, from the surf behind his home. Against the advice of his wife, he hides the sailor, operates on him, and preserves his life temporarily.

Becoming fearful for his family, he reports what he has done to his patient, an official in the Japanese military. The officer says he will arrange to have the American assassinated in order to spare possible retribution against Sadao, the surgeon, and his family. It doesn’t happen, and Sadao is left with determining how to rid himself of this hazard he has brought into his home and healed. He makes a series of decisions that lend themselves to widely varying interpretations in terms of his motivation.