Lin Mo, a newly-minted construction quality inspector, discovered a strange law in the workplace: on the day rust was deposited on the thermos cup, concrete dust was always floating in the conference room; every time the wind speed measured on the A4 paper dropped by 0.1M/s, there would be one more anomaly in the physical examination report of his colleagues. When she scanned her office chair with a detector, the alarm pointed to the shopping mall that collapsed in March—the steel bars were now hidden in the cracks of the keyboards she touched every day.