In Xinhai, a futuristic city where memories can be edited, extracted, and traded, top memory weaver Ling Chen can erase his clients' most painful recollections, yet he cannot repair the blank spot in his own mind where his childhood should be. A mysterious woman, Su Wan, comes to him with a broken, bloodstained memory fragment. She isn't asking him to help her forget; she wants him to recover the truth. When Ling Chen dives into this dangerous memory, he discovers that the clues hidden within it point, in a bizarre way, to his own lost past. In this city built on lies and memories, every search feels like a descent into the deep sea, and the truth's whisper may exist only in the moments that have been forgotten.