In the near future, memories can be read and navigated. "Memory Submarine" Lin Feng is a leader in the industry, able to sneak into the deepest consciousness of others and retrieve lost fragments. However, he himself is a person without a past - an accident three years ago made him a ghost in his own memory.
A mysterious commission broke his peaceful "empty" life: Su Wan, the daughter of a wealthy family, asked him to enter the memory of his father, who was in a vegetative state, to find a lost business secret. When Lin Feng dived into the decaying sea of consciousness, he was shocked to find that the voice of his own past was echoing on this strange island of memory. The truth he is looking for is not only related to the fate of a family, but also points to his erased past that is full of lies and betrayal.