黎明前的上海，社会各界知名人士纷纷响应中共民主主张，要求结束蒋家王朝专制统治。人心向背，大厦将倾，困兽犹斗的国民党国防部保密局，接受躲在溪口老家幕后指挥的蒋介石直接指令，针对那些无法公开清除的社会名人，炮制出一份“黑色名单”。军统昆明站干将黄龙杰被抽调组建代号为“闪电”的特别行动小组，展开一系列瞒天过海的暗杀活动。为此，黄龙杰以药业公司代表身份，携带妻子和部下分批赶到上海，向上海站站长韩天石报到，同时展开行动。 nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs;上海地下党组织敏锐地发现了这一动向，决定成立“曙光”行动小组，由表面上八面玲珑的商界女强人、实为地下党员的中洋贸易公司单身女经理郭家月牵头，执行保护任务，以年画作坊为掩护的情报站主任王怀志担任这一小组的联络人。 nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs;“曙光”一出手即技惊四座，全歼黄龙杰直接从昆明带来的三员干将。由此也引起了黄龙杰的注意，而他毫无察觉的是，他和郭家月之间还存在着一个特殊的关联人物——黄龙杰的妻子沈惠芸正是郭家月的大学好友。 nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs; nbs;围绕保卫和清除，黄龙杰和郭家月斗智斗勇，他们的属下周海亮、杨帆、肖风、田雨等也各显身手，其间又发生了很多错综复杂的人物关系。