ep 16 spoilers ahead

1.The princess is able to drive this guard off by threatening to kill herself. She then tries to make herself clean but is naturally upset (she was raped!) and feels like she has nothing, not even the dignity of a woman.

2.Meanwhile, for reasons never explained, Ling'er knows that if she burns the regents zither it will sever his connection to his wife and keep him in this world (kind of selfish) but it works

3.Back to Yu, who uses a map left by Jishu who has since left to unlock Jishu's hidden chamber of goodies. there is also something there pertaining to Ling'er that 'must never be opened'

4.It seems this is Jishu's will. he shows up, fights the empress, they stab each other in the heart and die side by side, talking about old times long since past, as the sky city she worked on is destroyed

5. (now its getting weird) princess uses her blood to summon 'blood flower' a demon that doesn't seem to be male or female. the target of hate seems to be Ling'er, because she has everything (the emperor...respect...virginity) while she has nothing at all (and she once thought she had it all). princess says she is willing to die for this revenge.

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