When dark red crystals are found under the fingernails of victims of a bizarre bombing, forensic doctor Lu Chen and team leader Lin Wan step into a fatal whirlpool. This "eclipsed memory fragment" can not only pollute the memory and detonate the host, but also imprint the "homing coordinates" in the survivors' brains. The investigation pointed to strange "ghost orders" and encrypted phone calls, and there seemed to be an existence called "The Collector" behind the scenes. What's even more frightening is that the "Eclipse Dog" parasitized by the debris has smelled the coordinates and started hunting. Lu Chen's accidental activation of the "Trace Tracing" ability became a double-edged sword, which not only allowed him to trace clues, but also made him a target of contamination. The dark red lines spreading on their shoulders are like a countdown. They must tear apart the rusty truth before the "nest" completes the summons, otherwise the entire city will become a sacrifice site. The boundaries between humans and non-humans are blurred and disintegrated in the etching of memories.