During World War II, a British plane was hit by the Germans during a bombing mission, and several British soldiers were forced to parachute to escape. They agreed to meet in a Turkish bath and used the code name of this operation, "Yuanyang Tea", as the connection code. They landed at different locations in the German-occupied zone of Paris, France. The bearded squadron leader Reginald was rescued by the zookeeper. The other two soldiers were hidden with the help of the painter Auguste (played by Bourville) and the band conductor Stanislas (played by Louis de Funes). Even though the Germans launched a city-wide search, the painter, the conductor and the squadron leader still met smoothly in the bathroom. After several twists and turns, the British soldiers finally got in touch. Several people who didn't know each other originally formed a life-and-death alliance and started a life-and-death game of wits and courage with the enemy. At the same time, they also made a lot of warm jokes. They used their meager strength to fight against the harsh German army, and they were in danger and funny. In order to escape from the tiger's mouth, they fought together.