Introducing Zhu Luan

In the third year after the death of Princess Yongjia, people suddenly died one after another in the capital.
Just as suspicions filled the city, the number one scholar on the other side, who was busy marrying a rich and powerful daughter, ushered in a "wretched wife" whom he had never seen before.
In order to eat melon, Yan Bei went to the Marquis's birthday banquet with his child in his arms to relieve his dignity. At a glance, he saw that the lady who came from the country to be the number one scholar was his ex-wife who disappeared three years ago!
Okay!
The number one scholar has become her sweetheart husband, so what does Yan Bei mean to him? Outer room? !