——An agent who kills without blood is the best assassin.
**Novel Introduction**:
In 1939, there was a turbulent undercurrent on the beach in Shanghai.
Military agent Jiang Linyuan returns to the isolated island with the mysterious Hidden Dragon System. He is the youngest Chinese detective in the French Concession and a "ghost" whose name is not found in the Japanese and puppet files.
When the traitor's throat burst into blood and the bacterial weapons at the bottom of the Huangpu River disappeared, Nan Zao Yunzi, director of the Special Higher Education Department, finally discovered:
The sandalwood ashes remaining beside each body,
The timer device that disappears before each explosion,
The evaporating figures in every dead end,
They all pointed to the "innocent" young man in the patrol room files.
