一场百年(nián )罕见的蝗灾(✒)侵袭了武(📒)周大地,武(wǔ )则天(🕋)下令送赈灾银往灾区(qū ),却在(zài )途(🎹)中(zhōng )被劫,数(shù )万(🍖)两白银竟化蝶消失!狄(🌫)仁杰命其亲随赵员(yuán )镇奉命彻(chè )查此(cǐ )案,自己微服潜(qián )入民间(🕯)调查。在查案(🥄)的过程(chéng )中(zhōng )(🚥)他们遇到了(🎿)需自证(zhèng )清(qīng )白的嫌(xián )疑(😻)人(rén )(🚸)官小(🚑)柒,又陷(xiàn )入了赈灾银再次被(🌙)劫的困窘之境。灾(zāi )(🚨)民民怨(😞)四起(🔢),化蝶案扑(pū )朔(shuò )(🌊)迷离,朝(💻)堂权谋暗(àn )潮汹涌(🏂),狄(dí )仁(rén )杰是否能查清(🙉)真相(⛓),天(⏰)下(xià )又是否能重回太平?