During the Second Sino-Japanese War, a five-man reconnaissance unit is dispatched to scout enemy positions in a volatile territory. After a sudden and intense firefight, the group is separated, leaving the survivors to wait in agonizing suspense at their outpost.

The young Takako Kuramoto has come to Tokyo to study and starts working for the rich Tashiro family as tutor of the daughter, Kumiko, while she receives attention from her two older brothers, Yukichi and Shinji. Meanwhile, the exact parentage of Shinji comes to light.