17 brides have been kidnapped by a ghost groom for over 100 years at Mount Yujun. Xie Lian descends to the mortal realm to help defeat the mountain's ghost and gain the merits of this mission to pay off his debt.
Pretending to be a bride Xie Lian along with some villagers, San Lang and Fu Yao go up Mount Yujun in the hopes to attract the Bridegroom ghost. As corpses rise he asks the procession to leave him behind as bait.
After the dead brides come to life, Xie Lian contacts Ling Wen about his theory about the bridegroom ghost. Pei Xiu and other heaven officials arrive and arrest Xuan Ji to seal her under a mountain.
Back in heaven Xie Lian finds out the butterfly stranger is Hua Cheng one of the four Calamities responsible for the defeat of 33 Gods. With his debt cleared, he decides to go to the mortal realm and build a temple for himself.
After finding out more information about "Crimson Rain Sought Flower" and escaping the Ghost Festival, Xie Lian invites San Lang to stay in the temple. In the morning he finds a painting of the Crown Prince hanging above the altar.
Merchants are going missing in Banyue Pass and Xie Lian is joined by Fu Yao and Nan Feng to investigate. The latter are very weary and suspicious of San Lang but a sand storm that takes Xie Lian away interrupts their bickering.
Reunited, the four seek shelter in a cave where they find a group of merchants and their guide. Scorpion Snakes surround them and Xie Lian and uncle Zheng are stung and the only antidote, the Shanyue Fern, is in the Banyue kingdom.
In the kingdom they find the Shanyue Fern which heals Xie Lian's hand. A commotion alerts the Banyue soldiers, who arrive to take the group hostage and throw a few of them in the Sinner's Pit. San Lang says goodbye and jumps in.
Xie Lian jumps the pit taking Kemo with him. He gets caught by San Lang, who seems to be different. With all the pit soldiers dead Kemo recalls the story of the downfall of his kingdom at the hands of the Imperial Preceptor.
When the Imperial Preceptor joins them, it's an unexpected reunion between her and Xie Lian the two having met over 200 years ago. Ban Yue apologizes for the treason but denies using the scorpion snakes to attack people.
Pei Xiu turns out to be the culprit. As Ban Yue's childhood friend he's the one responsible for convincing her to betray her kingdom and the massacre that followed. Xie Lian figures San Lang is actually Hua Cheng.
