48 Hours before the earth exploded, the exiled captain Ji Xiao sneaked into the fire storage in the center of the earth and discovered that the guardian Su Jin was actually a living key created by an alien civilization. When the top human beings are ordered to purify themselves, the rebel leader Han Jin intends to detonate the earth's core, and the consciousness of AI Ella-7 is being deleted frame by frame. Ji Xiao must unravel the truth of the locking agreement before Su Jin completely forgets who he is - the fire of civilization is never left by humans, but the embryo prepared by alien civilization for the next round of reincarnation.
