On the evening of March 19, 1942, an Allied aircraft carrying Believers arrived at Yangon Airport. When it landed, it was found that the airport had been occupied by the Japanese army.

What the Believers are carrying this time is the entire top-secret plan for the bombing of Tokyo, as well as the contact codes with the aircraft carrier formations in the Pacific and the bomber formations performing bombing missions. Once this document falls into the hands of the Japanese army, not only will the plan to bomb Tokyo fail, but the entire escort fleet will become a lamb to be slaughtered in the mouth of the Japanese army!

The believer was injured and parachuted out, landing on Sanzao Island where the Japanese Navy's Sixth Air Base was stationed. He was rescued and hid by local islanders.The Japanese army implemented a tight blockade on the island, and it was almost impossible to send people to the island to rescue them.Faced with this impossible task, the military intelligence department had to activate a long-term silent intelligence team, awakening the intelligence lumberjack stationed in Japan, Ichiro Takemu, and asking him to infiltrate Sanzao Island as a Japanese, in the name of an investigator of the Attendant's Office of the Emperor's Palace of Japan, on the pretext of investigating the crash of Japanese Navy Admiral Okaku Sumio!

The military intelligence department arranged for a local who was familiar with the islanders of Sanzao Island as an assistant to help Takemuichiro gain the trust of the islanders and thereby rescue the believers. This assistant was Ye Biying, a trainee female military doctor at the Eighth Route Army's left-behind office.

The two protagonists faced the Japanese's eager surveillance and temptation on the island, and they dealt with each other skillfully.How to find and escort believers and code books to escape from this isolated maritime prison has become the most urgent problem. During this seemingly impossible escape, the relationship between the two is gradually changing...