(2007)3.5Bruce EderLucrecia Martel's The Headless Woman is a psychological thriller with a topical edge, its story -- about a woman who may (or may not) have killed someone -- steeped in the class differences of modern-day Argentina. Martel's own screenplay never reveals too much, as her protagonist struggles against her own dread of discovering too much, and grapples with a social order whose members -- at her level -- don't wish to get too close to the truth of what happened. The viewer is left to guess, as much as the characters, at the actual events that are glimpsed obliquely. A line of dialogue here or there, seemingly innocent, takes on ominous potential meaning, as much to us as to the characters. Martel knows how to reveal precisely enough information, between her camera and her dialogue, to keep the viewer engrossed but also off balance, in a manner that sustains the suspense across most of the length of the movie. In the end, that suspense -- did she kill a dog, or was it a boy? -- coupled with several superb acting performances, drives this thriller to its unsettling conclusion.