Border Conspiracy

At the start of summer vacation, Chen Fei, a master of both medicine and martial arts, unexpectedly receives a final ultimatum, plunging him into a跨国连环 murder plot. Black iron sand death threats, lost Zhuge repeating crossbows, face-changing techniques that can fool anyone, and a sealed medical book—seemingly unrelated clues weave into a vast net. His teammates die mysteriously, with evidence pointing to Chen Fei; former comrades confront him with weapons drawn, Kuang Dao remains silent in self-preservation, and Li Li hesitates to speak—everyone around him is an "insider" with secrets. Wutian's imitation assassinations are flawless, Fujikawa Jun's behind-the-scenes schemes press closer, and the century-old grudges of the Expeditionary Force's spirits lurk in the shadows. Chen Fei must clear his name while uncovering the true mastermind, discovering amid the border's blade glints and human treachery: the deadliest scheme is the human heart; the most painful betrayal comes from brothers-in-arms. When the face-changing killer reappears and the truth of the spirits surfaces, who will laugh last in this border game staked with lives?