Actor Ren Tianye , Zhang Zhilv , Choenyi Tsering

Introduction: In a parallel universe 1216, year 2042, it is several years after the Wuxian M16 alien invasion of Earth. Fugitive soldier Cheng Ling of the United Earth Defense Force encounters an attack of alien hellhounds during scavenging and accidentally meets Zhu Rong's squad Gao Ren and others. Along the way, they encounter the predator's siege, the hellhound's pursuit, and befriend Dr. Dorjee Pam, who has mastered the technology of restraining alien hellhounds. During the journey, Cheng Ling became a qualified joint defense force under the inspiration of the team members' spirit of braving sacrifice and fighting back. When they reach the resistance stronghold, they discover that the so-called resistance stronghold is only a trap set by the Cerberus trappers. After a desperate resistance and the sacrifice of Gao Ren and others, Cheng Ling and Dorjee Pam successfully send out the "truth" signal, destroying the Cerberus trappers' plan to round up the resistance, thus starting the Earth Defense Force's counterattack against the alien invaders. The prologue of the Earth Defense Force against the alien invaders.