In the future city "Xinhai" where memories can be extracted, edited and traded, Lin Mo, a top memory restorer, is a man who has lost most of his past. Relying on the only vague fragments of a woman's smile that remained in his mind, he wandered among the broken memories of others. A strange request to delete "perfect memory" involved him in an elaborate conspiracy. The client, Su Qing, is a mysterious woman whose memory seems to be inextricably linked to Lin Mo's past. When the forgotten truth comes flooding in, Lin Mo must fight against the vast sea of forgetfulness on the island of memory to find the true proof of himself as a human being.
