谁是真正的寇斯？当你醒来大脑一片空白没有一点记忆，而身边有四个和你一样失去记忆的人，你会怎么办？五个失去记忆的人一起踏上寻找记忆碎片的道路，却发现他们五个人中有三个人是绑匪，另外两个人是人质。已知两个人质必须死，你不知道自己到底是个人质还是绑匪，只能强装镇定想办法。而绑匪的同伙正拿着赎金朝你们赶来，在你不知道自己是绑匪还是人质的情况下，你会怎么做？五个人为了寻找自己的真实身份，不得不暂时合作，通过电话和报纸上的讯息，来拼凑自己的真实身份！在所有人身份都没明了的时候，五个人决定先合作跑出去，以免绑匪同伙回来干掉自己！但随着剧情发展，你会发现坏人不是绝对的坏人，好人也不是绝对的好人。电影一波三折，结局接连反转，算得上是一部良心佳作

Who is the real Kos? When you wake up with a blank mind and no memory, and there are four people who have lost their memory like you, what will you do? Five people who lost their memories set out on the road of searching for memory fragments, but found that three of them were kidnappers and the other two were hostages. Knowing that the two hostages must die, you don't know whether you are a hostage or a kidnapper, so you can only pretend to be calm and find a way. And the accomplice of the kidnapper is coming towards you with the ransom, what will you do if you don't know whether you are a kidnapper or a hostage? In order to find out their true identities, the five had to temporarily cooperate and piece together their real identities through phone calls and messages in newspapers! When everyone's identities were unknown, the five decided to run out together first, lest the kidnapper accomplices come back and kill themselves! But as the plot develops, you will find that bad guys are not absolutely bad guys, and good guys are not absolutely good guys. The movie has twists and turns, and the ending is reversed one after another. It can be regarded as a masterpiece of conscience