1940, Hankou. Fog locks the Yangtze River.
Chen Mo stood behind the counter of Yuhe Pharmacy, nodding and bending down to grab medicine for the Japanese military police. He is a medicine dealer, timid and afraid of trouble, living like a shadow in this fallen city. No one knows his true identity - the most secretive lone wolf in the military, codenamed "Yantai".
Three days ago, a secret message was sent from Chongqing, with eight words: The heron is missing, and the password is suspected to be leaked.
Heron is an insider lurking at the highest level within the puppet government. What he held in his hand were all the codes for the Japanese defenses along the Yangtze River. As soon as he broke it off, the entire intelligence line was cut in half. Chongqing's order is: Sneak into Hankou, find the password, and eliminate the insider. There is no support, no response, no retreat.
But when Chen Mo stepped into Hankou for the first time, he realized that something was wrong.
The last message Heron sent with his life was only five words - don't trust anyone.
The contacts died one after another. The contact point was accurately removed. The Japanese and puppet encirclement is tightening step by step, and the "ghost" hiding in the dark seems to know every step of the plan better than him. Every time he escaped death, it felt like someone had deliberately left him alive. Chen Mo began to wonder: Was he performing a mission, or was he being led step by step to a preset ending?
From Hankou to Wuchang, and from Wuchang to Shanghai, Chen Mo followed along the Yangtze River. Every step closer to the truth brings another corpse around. In the silence of every deceased person, there is an unspoken secret.
Who is the mole? Is the heron alive or dead? What is hidden in the code book that is worth the lives of so many people? ——The answer is buried under the roar of the Yangtze River.
