<p>司徒空和沈小玉来到省俯，遇上等待揭榜消息的憨厚书生元幼安。半夜书生受伤呼救，显然有人谋害于他。接下来奇怪的事情更是不断发生。出于同情，司徒夫妇出面保护他，令两人惊奇的是，穷书生竟然与歌姬李雪儿打得火热。 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br/> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;谋杀终于发生了，死者却是一个与元幼安背景相似、同名同姓的赶考书生。更离奇的是元幼安中榜后也中毒身亡。到底谁是凶手呢？</p>