### Story summary
- **Time and space dislocation**: Zhou Wei, a graduate student in the history department, fainted at the Nanjing Massacre Memorial Hall and was reborn as Japanese Navy ensign Kaede Morikawa in 1935, at a historical node on the eve of the war of aggression against China.
- **Identity Dilemma**: As a Japanese officer with a Chinese soul, Morikawa Kaede must find a way to help China while maintaining his identity as a Japanese soldier. In the first battle, he saved Shanghai civilians by modifying intelligence.
- **Dangerous Choice**: While performing a mission in Hongkou District, Morikawa Kaede deliberately misled the Japanese bombardment coordinates and saved the civilian area that was about to be bombed, but it aroused the suspicion of Sato Ichiro, an officer of the Special High School.
- **Secret Line Layout**: Morikawa Kaede met Cheng Hua, a Chinese underground worker, and began to establish secret communication channels, using his identity as a Japanese soldier to obtain key intelligence.
- **Crisis is coming**: Sato Ichiro sets a trap to test Morikawa Kaede's loyalty, and a fatal test about identity and faith is about to come.
This time it mainly describes the identity adaptation process of the protagonist after his rebirth, and how he secretly helped Chinese civilians in his first military operation. It also shows his first confrontation with the officers of the Special High School, laying the groundwork for subsequent larger conflicts.
