In order to explore the mystery of the disappearance of his sister Shen Qing, Shen Yan, a former trace detection expert, stepped into the mysterious and unpredictable "Molin Ruins". In the small town, every falling corpse will trigger a reversal of time and space, resetting everything back to the rainy night three days ago. Here, Shen Yan's only ally Cheng Ye has countdown bloodshot eyes, but the murderer "Mo Lin" is well versed in criminal investigation countermeasures, and the palm prints of the black shadow in the mirror completely coincide with Shen Yan's. As the investigation deepens, when the blood-stained 0927 police badge appears in the stomach of the sixth corpse, Shen Yan gradually uncovers the bloody truth behind the town about the "space-time rift experiment" and falls into a huge crisis of self-recognition.