镇(zhèn )国公府(fǔ )嫡女沈(shěn )月华,与(yǔ )当朝宰(zǎi )相裴文(wén )宣自幼(yòu )相识,十(shí )年相知(zhī )相惜情根深种。不料大婚当日红妆已备,裴文宣竟执意要纳柳如烟为平妻,并要让柳氏先她一步入府。沈月华心冷决绝之下毅然转身,持父亲亲传的玄铁国公令深夜闯宫,以沈家(jiā )镇守疆(jiāng )土的兵(bīng )权为凭(píng )换得无(wú )上尊荣(róng ),自此另(lìng )辟前路(lù ),亲手执(zhí )掌自身(shēn )命运。