The birdcage on the top floor of the clock tower has been rusting for thirty years. What is locked inside is not a nightingale, but three hundred criminal recordings. The moment Lin Wan turned the key, her own voice came from the speaker: "I admit that I killed them." Lu Chen stood in the shadows and wiped his pistol: "You finally remembered? It was you who voted to execute your father ten years ago at the age of seven.