朝(cháo )代更迭、战乱四起,国家外临(lín )强敌、内遭瘟(wēn )疫。流民孤儿顾小树与王爷世子李逸(yì )自幼相(xiàng )伴,情谊(yì )深厚。不料王爷突下追杀令,李逸迫于(yú )身份,只(zhī )得暗中(zhōng )护送男主逃离城邦,并忍痛割席断交(jiāo )反目。男(nán )主在林(lín )中遭人伏击,幸得女箭客相救,同时有(yǒu )黑衣人(rén )透露其(qí )身世线索。为探寻真相,二人结伴踏上(shàng )旅途,逐(zhú )步揭开(kāi )隐藏在追杀令背后的惊天仇(chóu )恨与隐(yǐn )秘过往(wǎng )。