Nirvana in Fire Episode 7

Xia Dong, Xingrui, and Yujin travel back into the capital. Xie Bi tells Jingrui that their father told him to stop serving Prince Yu, causing Xingrui to realize that the Marquise was a Crown Prince Xian supporter. Xia Dong arrives at Xie Yu's manor to meet Mei Changsu. After her visit, she also tells an eavesdropping Xie Yu that she knows it was he who sent the assassins against her, but promises to keep it a secret, as Xie Yu brought back her husband's, Nie Feng's, body twelve years ago. Knowing full well that Prince Yu and Prince Xian would mess with Duke Qing's case to make it favor themselves, the emperor asks Prince Jing to supervise the case. Meanwhile, Mei Changsu and the two young masters stumble upon female corpses in a dilapidated manor, and reports it, while Xie Yu asks Zhuo Dingfeng to get rid of Mei Changsu. (Source: Wikipedia)