In the not-too-distant future, humans have defeated death at the cost of resetting their memories.
Every three years, everyone's memory will be cleared, and their identities, jobs, and relatives will be reassigned.
Lin Yuan is a "repairman" responsible for erasing those "malfunctioners" who are trying to retrieve the past.
Until one day, deep in his code, he heard a sound that shouldn't exist - it was a distress signal from the previous cycle.
This time, he didn't want to restart.
