In the climax of Walden, the seemingly unremarkable protagonist, Walden Dean, reveals himself as a vigilante killer. Throughout the film, Walden is depicted as a shy, devout, and seemingly harmless man whose life revolves around his job as a court stenographer and his intense desire to beat a typing record, which he believes is a way to gain recognition and love, especially from his absent mother. When diagnosed with a brain tumor, Walden’s mental state becomes increasingly skewed, which contributes to his violent acts. Whether the tumor is the primary cause of his actions remains ambiguous, but it clearly amplifies his courage and strength, fueling his final, murderous spree.
After killing two people—Colt, a convicted murderer of a child, and Nurse Mills, suspected of torturing patients—Walden's actions seem driven by a desperate need for justice and moral righteousness. His father’s harsh words, criticizing Walden’s obsession with trivial achievements, seem to awaken a deeper emotional unrest, sparking Walden to take justice into his own hands. His tragic past, including the loss of his mother and his feeling of inadequacy, contributes to his desire to be seen as more than just a nobody.
Meanwhile, Walden’s relationship with Emily, a woman who shows him a richer lifestyle, ends tragically when she leaves him after discovering he keeps personal files and secrets about his childhood. This rejection highlights Walden’s inner loneliness and inability to connect on a true emotional level.
As the story unfolds, Walden becomes involved in investigating a serial killer targeting children. His accidental presence at crime scenes and his actions, driven by a mix of moral outrage and confused perception, draw the attention of police detectives Bill and Sally. Through clever deduction, Walden uncovers the horrifying truth—that Judge Boyle is the real killer behind the children’s murders, exploiting young victims for personal perverse pleasures. Walden’s insight, aided by a remark George made about the ‘bad man,’ leads him to find crucial evidence—torn rope in Boyle’s car—that implicates the judge.
Confronting Boyle, Walden forces him to confess and ultimately drives him to commit suicide. This act ends Boyle’s reign of terror, and Walden’s vigilante justice appears to be validated by public sentiment—many see him as a hero, even as the police acknowledge that he’s the one who took justice into his own hands. While Walden’s mental state remains fragile, he is aware that the brain tumor might eventually kill him, and this awareness fuels his relentless pursuit of those he deems truly evil.
At the very end, Walden receives news that the serial killer has been released on bail, and his expression shows that he is prepared to continue his crusade. Whether motivated by his tumor or a desire for moral righteousness, Walden seems determined to fight against evil, even at the risk of losing himself entirely. The film ends with Walden on a path of vigilantism, heading out once more, just one word away from tying his typing record—symbolically reinforcing that his journey is about seeking justice and finding some semblance of meaning in a world full of darkness.
