In the future city "Xinhai" where memories can be extracted, traded or even erased, the top memory diver Lin Mo makes a living by sneaking into other people's brains and salvaging specific memories. He was calm and professional, like a ghost wandering in the deep sea of consciousness, until he accepted a commission from a mysterious wealthy businessman - to retrieve a tightly locked memory from the brain of a vegetable. When Lin Mo sneaked into the fragmented island of consciousness, he found that the fragments of memory echoed his dusty past. Every dive is an approach to the truth and a torture of one's own soul. Under pressure from clients and unknown dangers, he must piece together the truth that could overturn his entire world.