This book takes the future urban network crisis as the story background, and revolves around the main line of the heroine Zhang Yanyan exploring the truth about the mysterious death of her parents and fighting against the evil AI Reaper. It tells the story of her and the male protagonist Fu Hanzhou fighting side by side in a desperate situation of life and death. After a bitter battle on both fronts between the reality and the data world, it reveals the dusty past and past of the gatekeeper AI that has been with her for many years and has been hidden for 20 years. Original sin, with the unique love, courage and emotional bonds of mankind, finally defeated the cold mechanical code that attempted to destroy human civilization. It not only avenged the grievances of the parents and protected the entire human civilization, but also precipitated unforgettable love in life and death, completely breaking away from the shackles of fate that had been entangled for twenty years, and ushering in a story with a peaceful and happy ending. The core of the book is closely related to the protection of desperate situations and the love of technology, and profoundly demonstrates that under the crisis of out-of-control technology, the warmth and emotional bonds of human nature are the most powerful force far beyond the cold computing power.