This article is a follow-up to Sword and Sword IV, with an original female protagonist. Wangmeng was originally a special and ordinary girl on the coast of the East China Sea, but she was attracted by the mysterious power of the East China Sea and entered the East China Sea. Therefore, she met Xuan Xiao, a man who had been sealed in the East China Sea for more than 500 years. His loneliness made her fall in love with him, but Xuan Xiao still missed his former lover Suyu for 500 years, so he did not express his feelings to her. Wangmeng was able to see his old friend when Xuanxiao broke the seal and left the East China Sea. From then on, he cut off contact with Xuanxiao for five years. Five years later, the two were enemies instead of friends. Five years later, in just a blink of an eye, things and people had changed. The woman who had once been devoted to him had long since disappeared, and the only one left was Mu Ling, who would rather betray him than the world. Who is she? What debt did she owe others in her previous life that she needed to pay with her life in this life?