Jun Xunhuan comes down from the mountains on her master's orders to train a suitable heir for the Da Yi Dynasty, becoming its new Imperial Tutor.
The eldest prince is gentle and refined, the fourth princess clever and lively, and the sixth prince excels in both literary and martial arts...
Every one of them respects their teacher, is obedient and well-behaved, and makes a wonderful pupil she likes.
There is only one exception: the frail little princess deep in the palace, who coughs every few steps and is gentle and kind.
Because her mother was a palace maid, the little princess has lost her chance to become crown heir. Even the palace servants look down on her.
Jun Xunhuan takes pity on her and often looks after her.
But the little princess timidly tugs at her sleeve, her eyes red as she holds back her tears. "You show me such favoritism, Grand Tutor. If my royal siblings find out, they'll surely be jealous. You should stay away from an ill-omened person like me..."
That night, the princes push the little princess into a lake. She develops a dangerously high fever, yet still forces herself to plead for the others.
Heartbroken, Jun Xunhuan sternly punishes her dear pupils. She fails to notice the icy smile in the little princess's eyes.
Once she recovers, Jun Xunhuan takes the little princess to live by her side, sharing her meals and her quarters.
Her new pupil is perfect in every way: obedient, diligent, and always ready to make her bed and warm it for her... She never lets Jun Xunhuan lift a finger if she can help it.
It's just that every night, when Jun Xunhuan goes to sleep, she has some rather unspeakable dreams...
And she and the little princess are always in them...
This is truly a disgrace to a teacher's virtue!
Feeling terribly guilty, Jun Xunhuan leaves all the lessons to the princes and princesses, then prepares to make a run for it.
On the eve of the new emperor's ascension, the exceptionally gifted Imperial Tutor vanishes without a trace.
Countless young men and women in the capital are left heartbroken.
Yet no one could have imagined that, in a secret chamber, a young woman in imperial robes would kiss the captive over and over, her gaze dark. "I've made sure you can think of no one but me, day and night. Why are you still trying to run, Grand Tutor?"
Jun Xunhuan draws in a sharp breath. "Could it be that you put something in my calming tea...?"
So all those nights of bliss weren't dreams after all...
"It's not too late for you to realize it now, Grand Tutor."
The little princess has shed her former tearful, pitiful appearance. With a sinister look, she presses the imperial seal against Jun Xunhuan. "Now, the realm is mine, and so are you, Grand Tutor..."
Theme: Respect your teacher and cherish the Dao.