In the near future where memories can be accurately deleted, Lin Mo is the industry's top "memory purifier". He is calm and precise, cutting off the painful past of his clients like a surgeon, but he himself lives in a deliberately created blank. When a mysterious woman named Su Qing comes to his door, her request subverts his professional principles - she doesn't want to forget, she just wants to retrieve a memory that has been forcibly taken away. While diving into the depths of her broken memories, Lin Mo was horrified to find that those incomplete fragments and familiar melodies echoed with her dusty past. The scalpel in his hand was pointed at himself for the first time.