The daughter of Bai Jingyu, the mayor of Kuchuan City, and a genius brain scientist. She once underwent brain replacement surgery, and then underwent human body modification to gain extraordinary powers and wandered in the post-apocalyptic landscape for decades. It is suspected that she has undergone the transformation of "Angel Potion" and "Miracle K Potion".

In this thrilling continuation, former Wilderness Hunter Commander Marc has transformed into a blood-stained monster who destroys lighthouses. Guided by the enigmatic Bai Yuekui, he embarks on a new mission. The arrival of survivors on the ground reveals that the lighthouse isn't humanity's final refuge. Facing adversity, they harness their innate abilities to combat the Mana ecosystem. Bai Yuekui's past intricately links to Mark's origins and the apocalypse's truth.
 
Meanwhile, the colossal brain on the lighthouse awakens, the old shadows linger, and a new crisis emerges. As unprecedented disasters loom, where will the two human factions ultimately head?
 
(Source: BiliBili, translated)

Yuekui Bai's mysterious past and how it intricately links to Marc's origins and the apocalypse's truth, all of which are explored in this one long night.

The genius neuroscientist Bai Yuekui tried to save hermentor by transplanting his brain into the body of a death-row inmate. At the same time, geological disasters started occurring all over the place. Jones stole the Angel Serum and caused a series of mutations, as Jiuchuan City became hell on earth. The dust has not yet even settled yet, when the final apocalypse came...
 
(Source: Bilibili, translated)