In the near future where memories can be edited and deleted, Lin Zhou, a top memory organizer, performed a "forgetting operation" on himself, erasing the painful memories of his wife's accidental death. However, the surgery did not bring peace. Some "ghost memories" that do not belong to any client - the scent of jasmine, a vague melody, the silhouette of a woman - begin to invade his life. He discovered that what was forgotten did not disappear, but fell into a deeper abyss. In order to retrieve the truth and his incomplete soul, Lin Zhou must sneak into the restricted area of memory sealed by himself and fight against the deadly whisper from the abyss of forgetfulness.