The Crown Prince of Yan, Yu Feichen, married Yin Nanyao, the daughter of the Grand General of Zhenguo. The bride came to ask for her life as a wedding assassin. As soon as she entered the palace, she encountered the Crown Prince who died suddenly and wanted to be buried with her. The assassin, Yue Jian, quickly contacted the organization's second prince, but was unaware that the Crown Prince was actually playing the role of two anglers fishing to enforce the law. Yue Jian was navigating between the Crown Prince's Mansion and the organization, becoming increasingly unwilling to take action against Yu Feichen. Yu Feichen, with his dual identity, looked at the whole situation and became increasingly reluctant to expose Yue Jian

燕國太子喻非宸聯姻鎮國大將軍之女尹南瑤，新娘是替嫁殺手前來索命，剛入府就遇上太子暴斃要陪葬，殺手月見連忙與組織內應二皇子接頭，卻不知實際是太子分飾兩角釣魚執法。 月見在太子府和組織之間周旋，越來越不忍對喻非宸下手，喻非宸以兩重身份縱覽全域，也越來越捨不得戳穿月見……