Spy Code: The Widow

No transmigration. No system. No rebirth. Just flesh, blood, and iron will on the hidden front. Zheng Kaiqi infiltrates the Shanghai Municipal Police during the darkest days of occupation, where every breath could be his last and every decision costs lives. His success isn't his own—it belongs to the fallen heroes who died so he could live. Haunted by their sacrifice, he fights not for glory, but for a promise: to be buried beside them when his time comes. Living for the dead, dying for the living. Codename: The Undying.