After the Songhu Battle in 1939, Shanghai became an isolated island. There was an unlicensed Western medicine clinic hidden deep in the Baxian Bridge in the French Concession. The owner, Chen Yanqiu, is a surgeon who returned from Japan. He has no party affiliation and is cold-eyed and pragmatic. He only treats hidden wounds, gunshot wounds and hidden diseases that he dare not go to big hospitals. With his superb medical skills, he became the "live trump card" that the Japanese military police, traitor No. 76, Military agents, underground transportation stations and foreigners in the concession could not do without.
He originally wanted to shut himself up and survive in troubled times, but because of a pair of eyes that can read the shape of wounds, traces of poison and flaws in the human body, he was forced to be involved in the shocking secret of the Japanese army's secret reserve of mustard gas. He used the poison marks on the corpse to uncover the conspiracy, deciphered the identity of the mole from the perspective of the wound, and dismantled the Japanese army's deployment from the medication habits. He used the scalpel as a blade and medical knowledge as a shield to transfer suspicion through the internal strife between the Japanese and puppets.
There is no golden finger or good or evil in the book, and all the characters are struggling to survive in the gray area. The indifferent doctor hides a weak conscience, the elegant Japanese military doctor is trapped by the evil of the system, and the opportunistic traitor hides the instinct of survival. On the hidden front where no gunpowder can be seen, the hesitation and perseverance of the little people in troubled times create the most realistic picture of an isolated island spy war.
