The sun annihilates and eternal night falls. Along with the "Whisper" comes twisted monsters and crazy humanity. In order to find her missing daughter, top forensic doctor Su Rui breaks into the source of the disaster - an abandoned technological fortress shrouded in a seven-day time loop. Here, she reunited with her daughter's biological father, Gu Linyuan, a former technology giant who went bankrupt due to ethical disputes. When the scalpel comes face to face with unspeakable fear, and when scientific logic encounters the Cthulhu-style paradox of time and space, Su Rui discovers that the only way to save loved ones and humanity is not to kill monsters, but to dissect fear itself, completing an ultimate surgery on life, consciousness and civilization in an endless cycle.