沃伊特中士试图找出谁是谋杀金的幕后黑手，想出了令人难以置信的发现，并得知埃德温中士仍在玩一个双打游戏，意图与沃伊特一起走出大鱼的表面。与此同时，情报部门的所有成员都受到一个名为“影子”的未知组织的死亡威胁。在芝加哥的几个地方发生了火灾、爆炸和抢劫，“影子”对此负有责任，使城市陷入混乱。
Sergeant Voight tries to find out who is behind the murder of Jin, and come up with the unbelievable discovery and learned that Sergeant Edwin Stillwell playing a double game with the intention of getting out on the surface of the big fish along with Voight. In the meantime, all members of the intelligence departments receive death threats from an unknown group called "Shadow". At several places in Chicago in a fire, explosion, and robbery, for which "Shadow" take responsibility, bringing the city into chaos.
