Three former comrades from a wartime propaganda troupe join to form a senoir choir, and are soon joined by their other comrades, who find that it is an uplifting experience in their old age.
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.
The passenger ship Haiyan, with more than a thousand people aboard, sails through a thick fog at night. Despite having the knowledge that there are reefs nearby, the captain refuses to stop or slow down.
