In 9679, the laboratory in the Elf Kingdom became the last prison of mankind. Nalin woke up from the cold experimental table. At the age of five, she had almost no memory. As Experimental Subject 002, she and seven demons were trapped in Area A of the laboratory, undergoing drug injections and harsh training every day. The iron bars of the laboratory cut off all freedom. Until the arrival of the blind human boy Renku, he became a touch of color in this dark cage. The encounter of the same kind gave the desperate Nalin a glimmer of light, and everyone secretly planned to escape, and on the way they encountered layers of conspiracies in the laboratory. This is the last struggle of the lower class, an escape with life as a bet, from the cage to the wilderness, this is their last fight against fate.
Concept: Based on the laboratory escape of the remaining human beings, those who were transformed into demons were originally humans, and they and Na Lin depended on each other in a desperate situation. The work praises the warmth and the courage to live in a dark cage, accuses the shackles and plunder of life by the powerful, and expresses the eternal belief in fighting for mutual protection, whether untransformed humans or alienated compatriots, regardless of whether they are untransformed humans or alienated compatriots.