Unfortunate events beset a poor Chinese girl as she escapes from invading Japanese forces, narrowly avoids being raped, and seeks solace in a neighboring village.
The film shows a soldier - the defender of his people, his native land, convinced of the righteousness of the cause for which he is fighting, not sparing his life, longing to free his homeland for work and a peaceful life.
The Public Security Bureau intercept a telegram notifying foreign agents to retrieve the "110 secret". Shi Yan, head of the Reconnaissance Section, starts a campaign of counter-espionage, but one of his agents is soon killed on board a train.