In the near future where memories can be extracted, traded and erased, Lin Chen, a top memory evaluator, is like a precise clock, quantifying the joys and sorrows of life for clients day after day. He values everyone but forgets his own past. A mysterious commission brought about a broken memory of the lighthouse, which actually aroused a strange resonance in his stagnant heart. In order to pursue the truth, he set foot on a ruins of memory called "Echo Island". There, every forgotten moment turns into a ghost, and he must salvage the buried and true self in the sea of oblivion that swallows everything.
