The beautifully baleful glare of McDormand's Mildred Hayes. Credit: Fox Searchlight

The beautifully baleful glare of McDormand’s Mildred Hayes. Credit: Fox Searchlight
Frances McDormand has cornered the market on flinty. In award-winning performances like police chief Marge Gunderson in Fargo and the title character in HBO’s Olive Kitteridge, she has mastered the art of playing women who can bludgeon adversaries with the sheer power of common sense and a cold, unblinking stare. In her latest role, the grieving, revengeful mother Mildred Hayes in Martin McDonagh’s Three Billboards Outside Ebbing, Missouri, she is more fearsome than ever. Mildred is devastated by the brutal rape and murder of her daughter Angela and the inability of local police to arrest anyone for the crime after months of ostensible investigation, and decides to force attention to Angela’s case — even if it means ruining others’ lives in the process.

Mildred is relentless, and so is the movie. You are ready at any moment for something awful to happen — blood to be spilled, revenge to be enacted, a bad decision about to be carried through to its terrible, inevitable end. And yes, all those things happen in Three Billboards. But precisely because it is such a brooding, suspenseful film, the comic moments come as that much more of a shock.

Many of those laughs come courtesy of McDormand, who’s right at home with the mordant wit so characteristic of McDonagh’s writing (In Bruges, The Beauty Queen of Leenane). Mildred’s big idea is to post a raw challenge on three billboards outside her Missouri town — RAPED WHILE DYING/STILL NO ARRESTS/HOW COME, CHIEF WILLOUGHBY? — making the local police chief her particular target. That the chief is played by Woody Harrelson at his most teddy-bearish, paunch and all, and that the chief also has terminal pancreatic cancer, makes no never-mind to Mildred. When he asks how she could put up such billboards when she knows he’s dying, she responds, “They wouldn’t be so effective after you croak, would they?”

Frances McDormand’s Mildred is tough on Woody Harrelson’s kindly police chief. Credit: Fox Searchlight
The town of Ebbing mostly sympathizes with their beloved police chief, turning Mildred into a pariah. Their growing animosity toward her manifests itself in attempts at revenge that are at once shocking and shockingly funny — as when a dentist who sympathizes with Willoughby attempts to do some unnecessary drilling on her teeth, only to have her wrest the drill away from him and do some damage of her own. Afterwards, when Willoughby tries to interrogate Mildred about the incident, her heavily Novocained denials are a hoot — and Willoughby can’t help but smile at the situation. Similarly, when a sanctimonious town priest pays a call on Mildred to ask her to take down the billboards, her blistering, foul-mouthed reply is so on target, and so funny, that even her well-mannered teenaged son, beautifully underplayed by Lucas Hedges (Manchester by the Sea), is hard-pressed not to laugh.

The confluence of comedy and brutality is most pronounced in the character of Willoughby’s second in command, the bumbling, sadistic mama’s boy Officer Jason Dixon. Played just this side of caricature by Sam Rockwell, he’s a dim bulb who’s quick to anger and more incensed than anyone by Mildred’s billboard campaign. She knows just how to get under his skin, too. Knowing he’s been accused in the past of brutal treatment of black suspects, she greets him with “So how's it all going in the nigger-torturing business, Dixon?” To which he replies, with limp bravado, “It's ‘persons of color'-torturing business, these days, if you want to know.’”

But some of Dixon's violent outbursts strain credibility. Though it’s suggested that the townsfolk and Dixon’s fellow police officers tend to give his behavior a pass, he seems to get away with a hell of a lot without retribution from the upstanding police chief, and his mother (Sandy Martin), a a sour-faced harridan reminiscent of the hateful Irish mother in McDonagh's Beauty Queen, eggs him on. He’s deeply attached (and maybe, unconsciously, deeply attracted) to the chief, so that when tragedy strikes Willoughby it’s understandable that Dixon would be more than usually upset. But the reaction of passersby to his appalling, broad-daylight revenge against the young man who sold Mildred the billboards is oddly, unbelievably muted (although the chief’s replacement does finally give Dixon his walking papers).

McDonagh keeps you on edge: There are as many awful outcomes that don’t happen in the film as there are ones that do. Mildred’s relationship with her ex-husband Charlie (a lean, mean John Hawkes) is fraught with echoes of his past abuse of Mildred, aggravated by her profanely dismissive attitude toward his new, much younger, much dumber girlfriend (Samara Weaving). But explosive confrontations devolve into mutual grief — and the sense that what drives Mildred’s crusade is not just  anger at the cops but her own feelings of guilt. And later, when Mildred’s out on a quasi-date with “the town midget,” as Charlie refers to the kind-hearted James (Peter Dinklage in a distinct departure from GoT), Mildred’s reaction is not what you expect.

Dixon evolves, too — and if his evolution isn’t entirely believable, maybe that’s the point; McDonagh is keeping us on edge here, too. The maybe-reformed cop may lead the way to finding Angela’s murderer, or he may not. This film is less about whodunnit than it is about what happens afterwards — anger and guilt, yes, but also redemption. It will leave you with questions, with laughs, and most of all with the unforgettable face of Frances McDormand, who’s not merely expressive: She’s a loaded gun ready to fire.