Caleb Landry Jones delivers a remarkable performance as the central figure in this carefully constructed narrative detailing the events leading up to Australia’s deadliest mass shooting. The film’s name hints at the mental health struggles of this young man, which have been a source of mockery from his classmates and a considerable challenge for his parents, portrayed by Judy Davis and Anthony LaPaglia. He expresses a desire to learn how to surf, but needing money to purchase a board, he begins a lawn-mowing business. Asking an unusual, affluent woman named "Helen" (Essie Davis) if he can cut her grass, his equipment malfunctions, leading her to request that he instead walk her dogs. They develop a connection through a shared appreciation of Gilbert & Sullivan music, and following a disagreement with his weary mother, he moves in with Helen, and they begin planning a trip to Los Angeles. A devastating event occurs before the journey can take place, leaving him as the recipient of her considerable fortune. This unexpected inheritance arrives too late to prevent further familial misfortune but does allow him to finance an unhealthy fixation on readily accessible semi-automatic firearms. Judy Davis provides a sensitive and layered portrayal of his conflicted mother, while Essie Davis is also notably compelling as the dog-loving friend who offers him unconditional acceptance. The film unfolds as if disparate events are carefully arranged, poised to fall; when one does, it becomes clear that "Nitram" will relinquish any control he has left and turn to a disturbing act – though perhaps not this extreme! It's far from an uplifting experience, particularly during the later portion of the movie once all hope for the young man seems gone; however, it is definitely worth seeing if you’re looking for something thought-provoking.

Source on TMDB