Adapted from Yori Tsugu's novel of the same name, the novel is based on the experiences of heroes on the hidden front.It tells the story of our party members using their lives to cover up the enemy's blockade in an extreme period of time, breaking through the enemy's blockade, and obtaining and transporting sea maps of important strategic significance.

The story adopts a script-like narrative structure, which not only has the atmosphere of suspense and reasoning, but also the dangerous comradeship in the spy war, the legendary destiny of the Chinese sons and daughters under the crisis of the family and the country, and the innocent heart.