The Tang emperor is betrayed by one of his generals, who installs himself as emperor in the East Capital. The son of one of his slave workers escapes to the Shaolin Temple, learns kung fu, and sets out to kill the traitor who killed his father.

During the Ming Dynasty, Tso Siu Yan, a power-crazed eunuch who rules his desert region of China as if he were the Emperor, ruthlessly thwarts plots against him and sets a trap for one of his enemies at the Dragon Gate Inn.

孝明年间，山河动荡，武林黑暗。隐姓埋名的侯府公子左卿辞，以江湖游医身份，在两月之期内，寻找一卷遗失的山河图，由此结识了易容盗贼飞寇儿。飞寇儿背景神秘，为给师父苏璇盗药不慎曝光身份，竟是正阳孽徒——苏云落。

正阳掌门金虚真人号令武林，抓捕苏云落。左卿辞为救苏云落，不惜身陷江湖风波。此时危机频发，侯府满门遭到权臣威宁侯陷害，左卿辞不得不卷入家国乱局。苏云落与之一同抽丝剥茧，翻出一段江湖秘史，更由此牵连出一段十年前的朝堂真相。

江湖相知，庙堂对峙，一为光明筑道，一为黑暗破局。 他与她明明触手可及，却永隔一寸相思......