Xu Peiyu, seeking a cure for her strange nightmares, heads to Tongbo Mountain and fatefully meets Lin Chen, uncovering the first layer of mystery behind her dreams.
Xu Peiyu insists on hiring Lin Chen as her guide; Lin Chen joins to investigate his family secrets, marking the start of a dangerous mountain journey.
In the thick fog, Xu Peiyu falls into new hallucinations and Bai Qi goes missing; amid the chaos, Lin Chen begins to see her true motives, and trust slowly grows between them.
After falling into a trap and being rescued by Lan Dailing, the truth about the toxin in Xu Peiyu’s body starts to surface, deepening Lin Chen’s suspicions of Zhang Guihao.
While searching for the sacred tree, Xu Peiyu reveals her family curse, and Lan Dailing accidentally uncovers a dangerous conspiracy.
The sacred tree reveals the Xu family crest leading to the forbidden mountain; after a brutal attack, Lin Chen decides to confront his ancestral past, and Xu Peiyu chooses to follow him to the end.
The group ventures into the mist guided by paper figures, facing eerie rituals and illusions that test their trust and bonds.
Daoist priest Xiang Yunjian reveals the true family history; Lin Chen discloses the guardian’s mission, while Zhang Guihao’s murderous intent fully emerges.
The truth comes to light as Xu Peiyu stops taking the drug and realizes the real source of her visions, determined to stand by Lin Chen against their families’ darkest secrets.
A shocking skeletal discovery near the stone gate forces Xu Peiyu to confront her ancestors’ true nature as the struggle for power intensifies.
The stone gate opens, revealing a carved confession of ancient betrayal; Xu Peiyu vows justice as the deepest layers of the conspiracy surface.
The final truths about the toxin and betrayals are exposed; three years later, the group reunites at Tongbo Mountain, starting a new chapter of life and connection.
