本剧讲述大明使节云靖（曹培昌 饰）奉命出使瓦剌，遭到瓦剌的汉人丞相张宗周（达式常 饰）陷害而被扣留并放逐到漠北苦地牧羊。20年后，瓦剌与大明修好，云靖得以回归大明故土。因为云靖知道张宗周"复国"的大秘密，而被他的手下杀死在雁门关下，云靖的孙女云蕾（范冰冰 饰）和张宗周的儿子张丹枫（黄海冰 饰）初次相遇并亲眼目睹了这一惨剧。于是，云蕾背负着祖辈的深仇与张丹枫之间展开一段爱恨情仇，感人肺腑荡气回肠的故事。
100 years ago, the sisters Yod and Yard were the wives of Phra Wanathep. Yard was a loyal servant to madam Kamlai, his main wife. But Khun Thep asked Yod to help him get her sister and he would reward her. So Yod knocked her out and Wanathep raped her. Later, Yod tricks Yard into giving poison to Kamlai, to get rid of her and get Yard in trouble, so she can read morehave Khun Thep all to herself. So Yard unintentionally kills Kamlai and her 2 daughters. All the servants find out that Yard killed Kamlai so they hung her. Yod's mother finds out that she caused Yard's death so she stabbed Yod and put a curse on her, if she was to cause her mother to cry a tear again, she will never be able to get reborn.
明朝时期，为了寻找治国之道的太公天书，诚王爷和新科状元陆鼎文应明神宗之命，进入到太祖皇陵。皇陵需三把钥匙开启，二人各有一把，第三把则在皇陵之中。但这把钥匙也被尾随他们的日本忍者觊觎，而王爷也在这时翻脸袭击陆鼎文。幸好被路过的盗墓人出手相救，双方则为自己的小孩指腹为婚。平安的度过十八年，陆鼎文的女儿陆剑萍长大了，会一身功夫。一次意外，救了扮作书生的东厂杀手水若寒（吴奇隆 饰），结识了路过的小和尚释小龙、释小福，又引起了微服出巡的二皇子朱玉龙的注意，众人结成了友谊。活泼开朗的剑萍得到了皇帝的喜爱，被指婚给二皇子。但剑萍心系水若寒，于是开始了一场逃婚之旅。而这场变动则牵扯出十八年前的那场阴谋，也让剑萍和若寒有情人终成眷属。
