TIFF 2026 Review: Paradise Lost
One thing I’ve always appreciated about Korean psychological thrillers is how cleverly they’re written. There’s often so much more happening beneath the surface, and just when you think you’ve figured out the story, another layer completely changes your perspective. That’s exactly what I loved about Paradise Lost. Directed by Yeon Sang-ho, the filmmaker behind Train to Busan and The Ugly, Paradise Lost is a dark and unsettling psychological thriller that explores grief, artificial intelligence, motherhood and the complicated nature of human relationships.
The film follows Ryu So-young (Kim Hyun-joo), a mother whose son, Sun-woo, disappeared nine years earlier during a school camping trip. Unable to move on from the loss, she finds comfort in an AI-powered virtual recreation of her son, allowing her to maintain a connection with the child she believes is gone forever. Then, something unimaginable happens. Her real son returns. But the boy who comes home is no longer the child she remembers. He’s now a young adult, and there’s something deeply unsettling about him. Suddenly, So-young finds herself caught between the virtual version of her son, who remains the child she knows and loves, and the real person standing in front of her.
Going into Paradise Lost, you might expect the film to focus primarily on the dangers of AI and our growing emotional attachment to technology. And while AI plays an important role in the story, what I loved was how the film goes so much deeper than that. As the story unfolds, you begin to realize that there’s something much darker happening beneath the surface, particularly surrounding Sun-woo and the mystery of his disappearance. Without giving too much away, there are layers to this story that I genuinely didn’t see coming. What starts as an exploration of grief and technology becomes something much more disturbing.
A huge part of what makes Paradise Lost so effective is its cast. Kim Hyun-joo delivers a fantastic performance as So-young, a mother struggling to understand the son who has unexpectedly returned to her life. On one hand, she’s spent nine years wishing for this exact moment. On the other, the person who returns is almost a complete stranger. And as the situation becomes increasingly unsettling, you can see her struggling between fear, guilt and the unconditional love she’s supposed to have for her child.
What would you do if you were in her position? That’s a question I kept asking myself throughout the film. Bae Hyeon-seong, who plays Sun-woo, is equally impressive. There’s something genuinely terrifying about his performance, and I think what makes it so effective is how difficult he is to read. You never quite know what he’s thinking, what he’s capable of or what might happen next.
Beyond the mystery, Paradise Lost also raises some fascinating questions about human connection. As AI becomes more advanced, the idea of recreating someone we’ve lost no longer feels quite as far-fetched as it once might have. If technology allowed you to reconnect with someone you loved, would you take that opportunity? And what happens when the version of someone you’ve held onto in your memories no longer matches the person they actually are? It isn’t simply asking whether AI can replace a human connection. It’s also exploring the difference between loving someone for who they are and loving the version of them we’ve created in our minds. The film doesn’t give you easy answers, which is another reason I appreciated it.
Paradise Lost is one of those films that reminds me why I love Korean psychological thrillers so much. It’s smart, layered, unpredictable and genuinely terrifying at times. If you enjoy films that challenge your expectations, make you question the characters and leave you thinking long after they’re over, Paradise Lost is definitely worth watching.
Watch the trailer for Paradise Lost below
Well Go USA is set to release Paradise in US theatres on November 6, 2026