On an isolated island where the "tide of forgetfulness" periodically washes away memories, memory custodian Lin Mo is one of the few who fights against forgetfulness. He helps his clients piece together their broken past and maintains the afterimage of civilization. When his mentor, a "non-existent person" who should have been completely forgotten, is mysteriously murdered, Lin Mo is forced to embark on a dangerous path of pursuit. He must dig out the deeply buried truth from the blank ruins before the next "tide of oblivion" arrives. And his opponent is not only the murderer, but also the foundation on which this island depends for its survival - forgetfulness itself.
