In the third month after Chen Mo moved into the old house, his life began to be eroded by strange cracks.
Waking up at 3:17 in the morning has become the norm, and there is always an inappropriate smile hidden in the mottled old mirror in the bathroom. When he discovered that there was a toothbrush on the sink in the mirror that did not exist in reality, when the person in the mirror raised his middle finger to himself, and when a voice exactly like his own sounded in the empty room - "You can't run away," Chen Mo finally realized that the mirror was swallowing up his reality.
Files are inexplicably shifted, memories are broken, and shadows in reflective objects are always making different movements. This is not an illusion, but some kind of existence seeping through the mirror, weaving traps with subtle differences. As the world in the mirror deviates more and more from reality, Chen Mo has to face a horrifying possibility: maybe the thing imprisoned in the mirror was never that weird "it".
When the mirror becomes the critical point between two worlds, every confrontation is a dangerous game. He must find out the secret of the mirror before he is completely replaced - but are the mottled marks hidden in the peeling gilt a warning from his predecessors, or a bait?