The merchant ship "Lily of the Valley" aboard the interstellar noble Leia Astralia crashed in the unknown star field. When she climbed out of the ruins, she faced more than four hundred terrified survivors, only fifteen days of food rations, and a wild planet divided by ice, snow and virgin forests. A more terrifying threat lurks deep in the jungle - alien creatures called "demons" hunt humans in the dark, and their source points to an abyssal fissure called the "Lightless Mouth."
In a desperate situation, Liya used her calmness and organizational skills beyond her years to unite the survivors into a miniature civilization. She awakened Yu'an, a guardian who had been sleeping for thousands of years - he had participated in the crusade against the Abyss a thousand years ago, but lost his beloved Ayao in that battle, and since then sealed himself in the underground palace and used repentance as a prison. After waking up, Yu'an became the most powerful fighting force in the coalition, but the secret he carried was far beyond everyone's imagination: the abyss was not a foreign enemy, but a creation of an ancient civilization that was out of control.
The survivors formed a pact with the native Brays Kingdom. In the bloody battle at the pass, the ice field ambush and the final decisive battle in the abyss, Liya endured the heavy pressure of the leader as a mortal. In the process of fighting side by side with her, Yu An allowed himself to touch the wounds that had not healed for thousands of years for the first time - the old robe that A Yao had not finished sewing in the underground palace, and the needle hanging on it for thousands of years.
The pit lord was destroyed, but the whispers from deep within the rift did not die. It is accelerating with a certain pattern - like a heart slowly turning over in the dark, waiting to break out of the ground next time. At this moment, the people who survived the campfire sang ancient songs with hoarse voices.
