Patients in the consulting room begin to see reflections that "should not exist" and hear the whispers of the deceased. As a rationalist, Qin Chuan tried to explain everything scientifically until he saw another version of himself in the mirror - his movements were half a beat slower.
A bamboo stick from a mysterious old man selling candy and paintings gave him a glimpse of the truth: the so-called "cracks" are the festering projections of human beings' deeply buried traumas and obsessions in reality. The power of "mind resonance" he was given is the only hope to repair the world, but the price is that every time he uses it, he permanently loses part of his human emotions.
When reason becomes the rope entering the abyss and emotion becomes the fuel that must be consumed, Qin Chuan has to make a gamble with no chance of winning between saving the world and preserving himself.