Fan Chuan was an orphan who was adopted by the assassination organization "Shadow Sect" and grew into a ruthless top assassin. During an assassination mission, he discovered that the target was his childhood savior, Su Yuqing, the daughter of the prime minister. Driven by his conscience, he gave up the mission and betrayed the organization to protect her. As they get along day and night, their feelings for each other gradually develop, but they dare not confess because of the disparity in status. The prime minister discovered his identity as an assassin and mistakenly thought he was an undercover political enemy and expelled him. In order to completely protect Su Yuqing, Fan Chuan assassinated the prime minister's political opponents alone, and then single-handedly fought against the Shadow Sect and died together with the organization. When Su Yuqing arrived, she only saw him holding the candy given to him as a child tightly in his hand, and was heartbroken. A few years later, at the temple fair, she was shocked to see a familiar figure from behind, and ran desperately towards the figure that might change her destiny...
