一(yī )场百年(🌠)罕见(🔨)的(de )(🆓)蝗灾(zāi )侵袭了武周(🏽)大地,武则天(tiān )下令送(sòng )赈灾银往灾区,却在途中被劫,数万两白银竟化蝶消失(🎾)!狄仁杰(⏬)命其亲(qīn )随赵(zhào )(🏇)员镇奉命(mìng )彻查(⚫)此案,自(zì )己微(wēi )服潜入民(mín )间调查。在查(chá )案(🥄)的(de )过程中他(tā )们遇到了需自证(🗑)清白的嫌疑人(rén )官小(🚑)柒,又陷入(😱)了赈灾(zāi )银(yín )再次(🚢)被(🌙)劫的困(kùn )窘之境。灾民(🛑)民怨四(🖲)起(🔢),化蝶案扑(pū )朔迷离(🥎),朝(cháo )(💻)堂(🗞)权谋暗潮汹涌(yǒng ),狄仁杰(🌞)是否能查清真(💪)相,天下又是否能重回太平(🚻)?