Yin Dai and Lü Dongbin become husband and wife. Later, Yin Dai dies to save Lü Dongbin. Yin Dai's sister Xue Qiong creates troubles to avenge Lü Dongbin, but they are resolved by Dongbin one by one. Dongbin is determined to seek the truth and is finally enlightened by Han Zhongli to become an immortal. Lü Dongbin returns to the human world with a sword and becomes a "swordsman" to secretly protect the two brothers Cao You and Cao Gong. Cao You is framed by Xue Qiong and becomes a wanted criminal by the court. At the critical moment, Cao You sacrifices his life to save Cao Gong, and Dongbin converts him into an immortal. He Yuexian reunites with her sons Qingfeng and Qingsong after being separated for 18 years. However, Qingfeng is confused by Xue Qiong and refuses to recognize Yuexian, and she plots to frame her brother. With the help of Lü Dongbin, Qingfeng returns to the right path, but Yuexian sacrifices herself to save her son and is converted into an immortal. The Eight Immortals conquer Xue Qiong together and bring peace to the world. The Eight Immortals pass through the East China Sea and unexpectedly clash with the Third Prince of the Dragon King. Thus, the legend of the Eight Immortals crossing the sea, each displaying their magical powers, began.