In the 37th year of the fictional era, dimensional rifts suddenly tore apart all over the world. Alien beasts of all shapes and sizes swarmed out of the rifts, and their sharp claws tore apart mankind's illusion of peace. In just ten years, the once prosperous cities were reduced to ruins. Humanity was forced to retreat to the steel defense lines in major regions, surviving under the roars and sharp claws of alien beasts.
The Canglang Pass on the west side of the defense line is an important barrier against the invasion of alien beasts. However, due to the recent frequent attacks by high-level alien beasts, the military strength has been sharply reduced, food and grass are in short supply, and it is on the verge of collapse. Just when the defenders were about to give up their resistance, a former federal special operations commander, burdened with past glory and pain, was ordered to take over the defense command of Canglang Pass.
Facing the bloodthirsty and violent tide of low-level alien beasts, mid-level alien beasts with special abilities, and high-level alien beasts lurking in the dark that can destroy the entire defense line, he not only has to integrate the disorganized remnants of the army and use extremely precise tactics to resist waves of offensives, but he also has to deal with factional strife, resource competition, suspicion and suspicion within the defense line.
From studying the habits of strange animals, improving weapons and equipment, to forming an elite team and exploring confrontation strategies, he used his iron will and advanced military thinking to find hope in despair. Every battle is a game of life and death, and every defense is related to the survival of mankind. With the in-depth confrontation with the alien beasts, he gradually discovered that there seemed to be a greater secret hidden behind the invasion of the alien beasts. If humans want to truly survive, it is not just as simple as guarding the line of defense...
