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.

一队士兵在寻找日本秘密弹药库时，在拉姆里岛的沼泽中与致命的咸水鳄鱼对峙。灵感来自二战期间的真实事件。