Cheng Bing (played by Zhang Yi), the captain of the Criminal Investigation Brigade, caused the accidental death of a suspect in the process of handling a criminal case by the Third Brigade and was sentenced to prison. After being released from prison, he still insisted on tracking fugitive suspects as ordinary people. The film is adapted from real events and was originally published in \"Please tell the Director, the mission of the Third Brigade has been completed\" by Shenlan, the author of \"NetEase Human World Studio\". 一个人，一双鞋，一条命。现实原型之外的“藏”与“弃”。我执未竟之事。走穿这条命，光脚平风沙。难忘《三大队》以水为介的声音叙事。《三大队》：每个人都有自己要游到的岸。影片根据真实事件改编，原载于“网易人间工作室”作者深蓝的《请转告局长，三大队任务完成了》。现实比影视剧更加的充满了戏剧性。请转告局长，三大队任务完成了。坚持信念，这是最后的英雄主义 - 我给【不得不看】。“他的终场，我会亲手写上”。 刑侦大队队长程兵（张译 饰）带领的三大队在办理一起恶性案件的过程中导致嫌犯之一意外死亡，被判入狱。出狱后依然坚持以普通人身份追踪在逃嫌犯。 影片根据真实事件改编，原载于“网易人间工作室”作者深蓝的《请转告局长，三大队任务完成了》。
