It tells the story of Lin Yan, a former eunuch who took part in the imperial examination under his false name. The thin scar behind his ear was discovered by an old woman who searched him. The old woman secretly reported to the examiner, and a life-and-death game unfolded inside and outside the examination room. Lin Yan walks on the edge of a knife and uses his talents to maneuver. He not only wants to gain fame, but also needs to protect shocking secrets from the prying eyes of all forces. This is both the road to the imperial examination and the road to survival.
