An ex-con gets released early from prison only to be forced into an undercover unit of six men and on his first day the other five are all killed. Now he must go face-to-face with the men who he was tasked to spy on, not knowing if they know who he really is.世事无常，他们原本是敌对的；就算不是公开的敌对关系，至少双方连熟人都算不上，可现在，居然被现实逼迫到了这种地步；这样的现实，让每一个人心里都感觉到了由衷的讽刺。