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。THREE BILLBOARDS OUTSIDE EBBING, MISSOURI is a darkly comic drama from Academy Award nominee Martin McDonagh (In Bruges). After months have passed without a culprit in her daughter's murder case, Mildred Hayes (Academy Award winner Frances McDormand) makes a bold move, painting three signs leading into her town with a controversial message directed at William Willoughby (Academy Award nominee Woody Harrelson), the town's revered chief of police. When his second-in-command Officer Dixon (Sam Rockwell), an immature mother's boy with a penchant for violence, gets involved, the battle between Mildred and Ebbing's law enforcement is only exacerbated.