故(gù )事以大晟北境战事(shì )为背景,苍狼王八万(wàn )铁骑来犯,顾(gù )山河领五千步兵迎(yíng )敌,深陷绝境(jìng )。老将铁(tiě )向权袖手旁(páng )观,监军王挥月暗中(zhōng )通敌,构陷将(jiāng )士,按原结局,顾山河(hé )所部全军覆没,家族(zú )蒙难。太史令(lìng )沈文远因鸣冤获罪(zuì ),临刑时借史(shǐ )书之力穿越回悲剧(jù )前夕。他主动向顾山(shān )河示警,留在(zài )军中出谋划策,献策(cè )突围,奇袭敌(dí )粮,稳固军心。女医佐(zuǒ )柳千羽也逐渐放下(xià )戒备,与众人(rén )并肩作战。顾山河忍(rěn )辱游说铁向权换来(lái )援军,沈文远(yuǎn )设计揭穿王挥月通(tōng )敌罪行,获取(qǔ )敌军情报。决战之时(shí ),陈敢率三百人死守(shǒu )营寨掩护主(zhǔ )力转移。沈文远与柳(liǔ )千羽退守