How can there be a brother in the rivers and lakes to have fun?

When Zhengdao was still thinking about whether he could cultivate immortals in the world of martial arts, the Demon Cult had already sent the young master, whom he couldn't afford, into Zhengdao as an undercover agent. ——However, there seems to be something wrong?You are the young master of the Demon Cult who shoulders the important task of unifying the world!How could he be easily abducted by the Zhengdao elder brother? Hey!Rivers and lakes?Hehe, there is no brother in the rivers and lakes to have fun.