They are as close as brothers, but one is evil and the other is good. They are top secret agents, but one country is one. They have joined hands in the war of resistance, and they have also secretly played a life-and-death game. They know each other well, understand each other's character and wisdom. They fight secretly on the secret front I have spent my whole life as a spy for the enemy. This book is a panoramic spy novel with a long time span and many characters. The plots are intricately intertwined, the story is ups and downs, and there are many pitfalls. This book tests the author's skill, and also tests the reader's Wisdom and memory.