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"....。对方一直都知道自己的底牌，但自己却一直到最后，对方说出‘以暗器决胜负’这句话之后，才明白对方的底限所在！……