朝代(dài )更(gèng )迭、战乱四起,国家外(wài )临强敌、内遭瘟疫。流(liú )民(mín )孤儿顾小树与王爷世(shì )子李逸自幼相伴,情谊(yì )深(shēn )厚。不料王爷突下追杀(shā )令,李逸迫于身份,只得(dé )暗(àn )中护送男主逃离城邦(bāng ),并忍痛割席断交反目(mù )。男(nán )主在林中遭人伏击,幸(xìng )得女箭客相救,同时有(yǒu )黑衣人透露其身世线(xiàn )索(suǒ )。为探寻真相,二人结伴(bàn )踏上旅途,逐步揭开隐(yǐn )藏(cáng )在追杀令背后的惊天(tiān )仇恨与隐秘过往。