本片讲述了一个神探民警老张，老张是一个便衣警察，但却抓获犯罪分子无数，每次都能准确无误断案，这些年他的心酸也只有自己能体会，每次在街上抓贼时候的惊心动魄也只有自己能明白，他是外人眼中的神探，也是电视台上榜上有名的民警，无论什么样的犯罪分子，只要在他的眼前经过，必然逃不出他这双犹如老鹰一样锐利的眼睛，各种诈骗手段和小偷，都无法逃出他的手中，那些想要碰瓷的人，见到老张也会绕道走，老张的名声有了，功劳也有了，可是心却不安了，因为他最近经常发现自己后面有人尾随，他已经不如以前一样勇猛了，身体条件局限了行动，他得了哮喘，只要奔跑过量就会犯病，不能再和以前一样和犯罪分子跑马拉松，更何况家里除了他还有老人和孩子，老张心惊胆战了，身边也发生了很多猝不及防的事情

This film tells the story of a police detective, Zhang. Zhang is an undercover policeman, but he has captured countless criminals and can make accurate decisions every time. , these years, only I can understand his sadness, and every time I catch a thief on the street, only I can understand. He is a detective in the eyes of outsiders, and he is also a famous policeman on the TV station. As long as you pass in front of his eyes, you will definitely not be able to escape his sharp eagle-like eyes. All kinds of fraudulent methods and thieves will not be able to escape his hands. Will take a detour, Lao Zhang's reputation has been gained, and the credit has been gained, but his heart is uneasy, because he often finds himself followed by people recently, he is not as brave as before, his physical condition limits his actions, he has asthma, as long as If you run too much, you will get sick, and you can no longer run marathons with criminals like before. What's more, besides him, there are old people and children at home. Lao Zhang is frightened, and many unexpected things happened around him