Lin Zhiheng is an orphan, taken in and raised by a kind woman who becomes her master.
When Lin Zhiheng is fourteen, her master gives her a piece of green jade strung on a plain cord and makes her promise: if the jade ever lights up for someone, she must save that person at all costs and protect their life. Lin Zhiheng agrees.
Later, her master disappears, and the jade never lights up.
Then one day, she happens upon an assassination attempt.
The last time she'd gotten involved in something like this, she ended up being hunted too. This time, she hesitates. Her own life matters, after all, so she decides to pretend she saw nothing. Just as she turns to leave, the jade hanging against her chest begins to glow…
