In the future city of Flowing Light, where memories can be extracted, traded or even erased, Lin Xun, a top memory master, makes a living by exploring other people's deepest secrets, but has forgotten only his own past. A taboo commission from the powerful Chen Mo completely destroyed a bloody memory and dragged Lin Xun into a dangerous whirlpool. In the process of exploring the restricted area of Chen Mo's memory, he met Xiaotong, a girl who sells happy memories to survive. Two seemingly unrelated memories, like two pieces of a puzzle, gradually point to a truth forgotten by the city, and also knock on the rusty door of Lin Xun's own island of memory. He must sail through the sea of oblivion to find himself and justice.
