In Xinhai City, shrouded in neon and rain, memories can be extracted, edited and deleted. "Memory Scavenger" Chen Mo, a man who makes a living by cleaning up other people's painful memories, is troubled by his own memory amnesia. A mysterious commission draws him into the whirlpool: an elegant woman named Lin Wan asks him to retrieve a deeply buried taboo memory about the "White Room" at no expense. While diving into the sea of broken memories of his clients, Chen Mo was horrified to discover that those memory fragments that should have belonged to others actually had a fatal echo with his forgotten past. He must uncover the truth that could overturn the entire city before his mental island completely sinks into the sea of oblivion.