An accidental rescue in an alley on a rainy night intertwined the fate of ordinary white-collar Su Yao with the mysterious and noble Lu Jingchen. He broke into her life with just the right amount of gentleness, but there was a flash of solemnity hidden in every gap between his affectionate gazes. When Su Yao finally fell into the sweet trap he weaved, she discovered that this man's world was far from as simple as it seemed.
Lu Jingchen, the heir to the ancient Lu family, is surrounded by intricate power struggles and enemies lurking in the dark. Just as the relationship between the two was heating up, a well-planned conspiracy put Lu Jingchen behind bars. In the process of clearing his grievances, Su Yao not only discovered that there was an extraordinary power sleeping in her body, but also uncovered a shocking fact - her bloodline was the "key" that an ancient organization was looking for.
What is most difficult for Su Yao to accept is that the encounter on that rainy night seemed to have been no accident from the beginning. When the truth of the "Moon Eclipse" plan gradually emerges, and when every look between her and Lu Jingchen hides a mystery, is this love that begins with redemption a well-designed conspiracy, or is it a prelude that has already been written by fate?
At the junction of light and darkness, Su Yao must make a choice: continue to be a protected lover, or awaken to become a guardian who can stand side by side with her lover? When the final mystery is revealed, how will she face the truth that may subvert everything?