Before the Marco Polo Bridge Incident, a Chinese naval warship captain and a torpedo expert are attacked, while German experts helping China defend against the Japanese navy are killed in Nanjing. It is all connected to a spy codenamed “Plum Blossom,” hiding within the Kuomintang government.
Ye Xiao, an underground Communist Party member embedded in the Kuomintang Navy Department, stages a calculated act of self-sacrifice and successfully gets recruited by the Japanese navy as a Japanese spy. But when he sets out to unmask Plum Blossom, he discovers a shocking Japanese naval plot against China. The Chinese navy is on the brink of disaster...
