Giới thiệu: In search of the whereabouts of the Jade Sword, a three-way war erupts among the immortal, demonic, and dragon clans. With the help of Uncle Lan, Qin Yu possesses the eighth Jade Sword, becoming the leader of the fourth major power in the underwater realm. Qin Yu is determined to face a new challenge - to gather all the Jade Swords and open the Immortal Mansion. In the end, the Immortal Mansion slowly opens, and as one steps into this treasure land, the true test of life and death has only just begun.