1949年11月,白崇禧率国民党军残部逃至广西柳州,为了掩护他逃向台湾的阴谋,他佯装驻扎柳州与解放军对峙,柳州地下党为了保卫柳州,与白崇禧的部队进行了艰苦的斗争,终于保住了柳州市的安全,并迫使敌人放弃了破坏的阴谋,最终,白崇禧在人民解放军的大举进攻下不得不逃至台湾。
Lewis returns to Oxford after several years absence and is reluctantly assigned by his new boss, DCS Innocent, to the murder of an Oxford mathematics student who was shot while participating in a sleep study. The key-code used to access the sleep lab was assigned to a fellow maths student, Daniel Griffin, but Daniel's math tutor has provided him with an alibi. Daniel is a maladjusted young man who will soon inherit his father's automotive empire. He is disruptive and has no respect for his uncle who now heads the company. The future of the company however rests on an impending deal with Japanese investors who insist that family unity is all important at this time. When two other murder occurs, Lewis must decipher a cryptic clue left in an old case file by his former boss, Chief Inspector Morse.