该书主要以发生在北京的大案要案为故事素材：徐虎与"梨园弟子"宣北平、于燕华的贩毒案；陆军上尉的贩枪案；老鬼、桦子绑架人质撕票案；云上人间夜总会、紫丁香夜总会涉嫌洗钱卖淫案；李局等人贪污腐化堕落案，等等。全书将这些真实的案件、真实的人物放到真实的社会大环境中，在环环紧扣的故事悬念之中，展现了黑衣特警季枫、章大为、周可心、李同、李寻、曹铁等人与罪犯斗智斗勇的精彩画面，说明了正义战胜邪恶是颠扑不破的真理。 (The book takes the major cases mainly occurred in Beijing as the material like Xu Hu and "Members of the palace theater" Xuan Beiping and Yu Yanhua drug selling case; Army captain's gun selling case; Old ghost and birch kidnapping and killing hostage case; Cloud nightclub and lilacs nightclub money laundering prostitution case; Lee bureau people such as corruption case, and so on. The book puts the real case, real people in real social environment. In hook-ups suspense stories, it shows the colorful pictures of the special policeman in black Ji Feng, Zhang Dawei, Zhou Kexin, Li Tong, Li Xun, Cao Tie, and so on, bravely fighting with criminals, and proves the victory of justice over evil is the irrefutable truth.)