He Killed Six People. I Was the Seventh.

He killed six people. Zhang Cheng'an died in his study, a Su family jade hairpin lodged in his throat. Li Song died in his bedroom, with a strange scent of jasmine lingering beside his pillow. Wang Li, Zhao Qianyi, Liu Chongwen, Wu Shien... One by one, they died in different ways, but beside every body lay a neatly written note pointing to the Grand Tutor of the court. I am the seventh person to investigate this case. Everyone says the killer is among the court officials. I'm the only one who noticed that a gray-clad old servant was “conveniently” present at every murder scene. He has served the Grand Tutor for thirty-one years and saved the lives of everyone in the household. They all say he's a good man. Until I tore open the scar on his left arm... Beneath it was a maple-leaf birthmark. It was the mark of the only young son who vanished when the entire Chen family was executed thirty-one years ago. He waited thirty-one years just to kill six people. Then he handed me a bowl of tea. “Lord Xie, everything you've found is true,” he said. “But you can't touch me.” Because I'm next. I'm the seventh.