True and False Bamboo Horse

Twelve years ago, he made a promise to her, "I swear to this vast mountain and sea, I will always be with you for the rest of my life." A seemingly unexpected accident involved his parents, and he disappeared... Twelve years later, in order to find him, she was involved in a bizarre case. She almost died, but she was saved. The matter was complicated and confusing, and layers of fog were gradually unveiled. What kind of filth was behind it, and the truth of twelve years ago was gradually revealed... Can lovers finally become lovers...