介绍：一名年轻的线人被派去执行一项危险的卧底行动这是一部毫无保留的影片，讲述了禁毒战争中那些脆弱的步兵，以及被迫为警方工作的年轻罪犯。

介绍：The Saphead is a 1920 comedy film featuring Buster Keaton. It was the actor's first starring role in a full-length feature and the film that launched his career.　　The plot was a merging of two stories, Bronson Howard's play The Henrietta and the novel The New Henrietta by Victor Mapes and Winchell Smith, which was meant to be an adaption of Howard's play.