Who were the two women who appeared in Duke Lan Yu's study that could surprise Nian Bing so much? They were the Ru Yi sisters, whom Nian Bing had met at the brothel in Binglan City several months ago. After a brief blank in his mind, Nian Bing instantly understood the sisters' identities. He had already known back then that these sisters were spies sent by other countries to the Bing Yue Empire and the Oulan Empire. Now that they had appeared at the residence of Duke Lan Yu, the head officer of the Oulan Empire, obviously they were under the Duke's command. The benefactor whom Ru Meng had mentioned must be this Duke Lan Yu, and the benefactor's daughter must also be Miss Lan Chen, who is not currently in the residence. The only one left to confront was the heartless betrayer. It indeed was a case of the world being too small!
Duke Lan Yu was surprised as he looked at the transformed Nian Bing and asked, "Do you know each other?"