What Is The Ending Of Memoirs Of A Murderer Explained?

In 'Memoir of a Murderer', the plot twist hits hard when you realize the protagonist, a former serial killer with Alzheimer’s, isn’t the one committing the new murders. He’s convinced a local detective is the culprit, but his fading memory makes it impossible to trust his own judgment. The twist comes when it’s revealed that his daughter, whom he’s been trying to protect, is actually the one behind the killings. This revelation flips the entire narrative, forcing you to question every assumption you’ve made. The story masterfully plays with the idea of unreliable memory and the lengths a parent will go to protect their child, even if it means confronting their own dark past.

In 'Memoir of a Murderer', the ending is a haunting blend of justice and ambiguity. The protagonist, a former serial killer with Alzheimer’s, confronts a younger murderer who’s been terrorizing the town. In a tense final showdown, he manages to outwit the killer, but his fading memory leaves him unsure if he’s truly stopped the threat or if he’s just imagining it. The film closes with him staring into the distance, questioning his own reality. It’s a chilling reminder of how memory and morality can blur, leaving the audience to grapple with the unsettling question of whether justice was truly served.

In 'Memoir of a Murderer', the psychology of the killer is portrayed through his internal monologues and fragmented memories. The story dives deep into his mind, showing how he justifies his actions by believing he’s eliminating evil from the world. His perspective is chilling because he doesn’t see himself as a monster but as someone carrying out a necessary duty. The narrative blurs the line between right and wrong, making you question morality itself. What’s fascinating is how his past trauma shapes his present actions, revealing a cycle of violence that’s hard to break. The film doesn’t glorify his deeds but forces you to understand the complexity of his psyche, making it a gripping exploration of human darkness.

I’ve always been fascinated by 'Memoir of a Murderer', and while it’s gripping, it’s not based on a true story. The novel is a work of fiction, crafted to explore the psychological depth of a serial killer grappling with memory loss. What makes it so compelling is how it mirrors real-life fears about identity and morality. The author draws inspiration from true crime elements, like the meticulous planning of murders and the cat-and-mouse game with law enforcement, but the characters and events are entirely fictional. It’s a chilling reminder of how fiction can feel so real, especially when it taps into universal anxieties.

If you’ve ever watched the movie and felt a chill thinking it might be real, you’re not alone — the film is written and shot to feel uncomfortably plausible. Still, no: 'Memoir of a Murderer' (the 2017 Korean film) is not based on a true story. It’s adapted from a 2013 novel by Kim Young-ha, often translated as 'Murderer's Memory' or rendered in English-language listings as 'Memoir of a Murderer'. The movie was directed by Won Shin-yun and stars Sol Kyung-gu and Kim Nam-gil, and both book and film are fictional psychological thrillers that explore memory, guilt, and the horror of losing yourself to dementia. I watched the film late one night and then picked up the novel because I was curious how the narrator’s interior life from the book translated to the screen. The novel leans hard into the unreliable narrator — first-person internal monologue, fragmented memories — whereas the film externalizes that confusion with visual tricks, flashbacks, and a tight focus on the protagonist’s deteriorating mind. People sometimes assume it’s true because the depiction of Alzheimer’s and the moral grayness of the protagonist feel raw and lived-in, but that authenticity is the strength of the writer’s imagination, not a report of actual events. If you like context, it helps to think of 'Memoir of a Murderer' alongside films like 'Memento' or dark Korean thrillers such as 'I Saw the Devil' — they all toy with memory, revenge, and moral ambiguity. The biggest takeaway is that the core story (a former killer with Alzheimer’s suspecting a copycat and struggling to remember) is fictional. That said, the themes are grounded in real human experience — memory loss, the regret of past sins, the fear of losing identity — which is why it hits so hard for many viewers. For a fuller experience, read Kim Young-ha’s book after watching the film: the book’s voice gives you richer internal detail and slightly different beats, while the movie sharpens the suspense with a handful of changed scenes and a more cinematic ending. I still find myself thinking about certain images weeks later, so whether you watch or read first, be ready for a story that lingers in a very human way.

I got pulled into this one on a slow, rainy afternoon and felt the two versions like cousins who grew up in different countries. Reading 'Memoirs of a Murderer' gave me a slow-burn, interior ride — a lot of the book lives inside the protagonist's head, so you spend pages swimming in doubt, memory lapses, and guilt. The novel can luxuriate in ambiguity: is the narrator reliable? Which memories are real and which are self-protective lies? That internal haze creates a moral fog that makes every small detail feel heavy. The film version, 'Memoir of a Murderer', has to work visually and within a tighter runtime, so it externalizes a lot of those inward battles. Scenes that were paragraphs of internal conflict in the book become close-ups, flashbacks, or tense confrontations. The result is a sharper focus on plot momentum — more visible stakes, clearer timelines, and often a more cinematic emotional payoff. Characters get compressed, some subplots trimmed or reshaped, and the villain/ally dynamics are framed to read on screen. I also noticed the film leans into sensory things — music, lighting, actor expressions — turning psychological suspense into visceral moments. Both versions are satisfying, just in different ways: one asks you to sit with uncertainty; the other grabs you by the throat and makes you feel it now. If you love slow, gnawing introspection, linger with the book. If you want the tension amplified and the relationships dramatized, the movie delivers that punch, too.

I couldn't put down 'Diary of a Murderer and Other Stories' once I started, and that ending—whew. The titular story, 'Diary of a Murderer,' follows an aging serial killer whose memory is fading due to Alzheimer's. The twist is brutal: he realizes his adopted daughter might be his next victim because he can't recall if he's already killed her. The final pages are a blur of paranoia and fragmented thoughts, leaving you unsure whether he actually harms her or if it's all in his deteriorating mind. It's haunting, especially how Kim Young-ha plays with unreliable narration. The other stories in the collection are just as unsettling, but this one lingers like a shadow you can't shake. What stuck with me was how the story forces you to empathize with a monster. The killer's fear of losing himself is so visceral that you almost forget his crimes—until the gut-punch reminder of what he's capable of. The ambiguity of the ending is masterful; it doesn't tie things up neatly, leaving you to wrestle with the moral vertigo. I spent days debating with friends whether the daughter survived or if the entire diary was a confession from beyond the grave. That's the mark of great storytelling—it invades your thoughts long after the last page.