十二年前七万赤焰军被奸人所害导致全军覆没，冤死梅岭，只剩少帅林殊（张哲瀚 饰）侥幸生还。十二年后林殊改头换面化身“麒麟才子”梅长苏（胡歌 饰），建立江左盟，以“琅琊榜”第一才子的身份重返帝都。梅长苏背负血海深仇，暗中帮助昔日挚友靖王（王凯 饰）周旋于太子（高鑫 饰）与誉王（黄维德 饰）的斗争之中，同时又遇到了昔日未婚妻——云南王郡主穆霓凰（刘涛 饰）却不能相见。梅长苏以病弱之躯为昭雪冤案、为振兴河山，踏上了一条黑暗又惊心动魄的夺嫡之路。

因被人诬陷谋反而没落的官宦家之女，在女扮男装卖书糊口的过程中，与拥有帅气外貌的神秘书生相识后展开的故事。最后她发现原来这位神秘的书生是吸血鬼，而且在朝鲜宫中还有邪恶的吸血鬼存在。

以朝鲜时代为背景的虚拟王朝，星宿厅巫女因目睹宫闱阴谋遭到追杀，幸得弘文馆提学夫人申氏（梁美京 饰）相救。巫女看出申氏肚子里怀的女孩是“朝鲜之月”，高贵荣耀，但只要接近“朝鲜之阳”就会遭遇灭门之灾。为报答申氏恩情，巫女临死前托付同为巫女的好友张绿英（全美善 饰）守护这个孩子。申氏生下女儿，取名烟雨。十三年后，烟雨（韩佳人 饰）机缘巧合结识了世子李暄（金秀贤 饰），李暄对烟雨一见倾心。李暄仰慕且依赖的异母兄长——阳明君（丁一宇 饰）也深深爱慕烟雨，弟弟对烟雨的感情令他内心倍感痛苦。此时，后宫中的一场阴谋彻底改变了三人的命运，巫女的预言一步步成为现实，两个“月亮”和两个“太阳”之间的情仇爱恨，就在朝鲜的深宫中拉开了帷幕…… 根据韩国作家廷银阙同名小说改编，当年创下韩国收视率第一。

During the Northern Song Dynasty, foreign tribes coveted the territory of the Great Song, creating a confrontational situation between the Han and non-Han ethnic groups. Qiao Feng (portrayed by Felix Wong), the leader of the Beggars' Sect, was falsely accused of being a descendant of the Khitans as revenge for rejecting the love of Kang Min (portrayed by Yim Wai-ming), the wife of the deputy leader. He was despised by martial artists in the Central Plains. Determined to clear his name, Qiao Feng searched everywhere for clues about his origin. During this period, he met Duan Yu (portrayed by Benny Chan), the prince of Dali, and the monk Xu Zhu (portrayed by Fan Siu-wong), and they became sworn brothers.