The world is not as solid as you see it.
For social worker Lin Ke and convenience store night clerk Su Qian, life was originally just an ordinary struggle day after day. Until that weird midnight, a transaction that shouldn't exist dragged them into a nightmare like an urban legend - a convenience store swallowed by endless fog, and a "customer" with stiff behavior and pupils flashing with snowflake noise.
The two people who were lucky enough to survive found themselves bound to a strange APP that could not be uninstalled - "Threshold Diary". It coldly declares that they have become "resonators" who can perceive and step into the "liminal spaces" in the cracks of reality where the rules are disordered and where unspeakable things lurk.
