故事围绕一对住在纽约的亚裔夫妇展开，他们的儿子突然被绑架，事件成为导火索，使得夫妻之间埋藏的秘密逐渐浮出水面。
米尔德雷德（弗兰西斯·麦克多蒙德 Frances McDormand 饰）的女儿在外出时惨遭奸杀，米尔德雷德和丈夫查理（约翰·哈克斯 John Hawkes 饰）之间的婚姻因此走到了尽头，如今，她同儿子罗比（卢卡斯·赫奇斯 Lucas Hedges饰）过着相依为命的生活。一晃眼几个月过去了，案件仍然没有告破预兆，而警方似乎早已经将注意力从案子上转移了开来。 被绝望和痛苦缠绕的米尔德雷德租下了高速公路边上的三块巨型广告牌，在上面控诉警方办案无能，并将矛头直接对准了警察局局长威洛比（伍迪·哈里森 Woody Harrelson 饰）。实际上，威洛比一直隐瞒着自己身患绝症命不久矣的事实。因为这三块广告牌，米尔德雷德和威洛比的生活发生了翻天覆地的变化。
An unadorned perspective on impoverished life in Okinawa. 17-year-old Aoi works as a nightclub hostess in order to earn rent money and to provide for her little boy and his lazy father, who has no qualms about hitting his wife. Yet how dark does reality have to get before it stifles the rays of hope that filter through?
Charles Burnett, one of America's most highly regarded independent filmmakers, wrote and directed this domestic drama about a black middle-class family living in South central Los Angeles. However, there are no gangs, no guns, no drugs but instead a lyrical story that draws on folklore and the supernatural. family tensions are already simmering when Harry (Danny Glover) arrives...
