A twisty yacht suspense that keeps you engaged despite its flaws
I went into The Woman in Cabin 10 without massive expectations, and honestly, that worked in my favor. This Netflix psychological suspense film starring Keira Knightley isn’t going to win any awards for originality, but it kept me entertained from start to finish, and sometimes that’s all you need from a Friday night movie.
The story follows Lo Blacklock, an investigative journalist played by Keira Knightley, who gets invited on a luxury yacht cruise to cover a story about a billionaire couple’s new charitable foundation. Lo is dealing with some serious trauma after recently witnessing a source get murdered for talking to her, so she’s already on edge when she boards this fancy yacht. The cruise is supposed to be three days of writing, networking, and maybe some relaxation as they sail from the UK to Norway.
On the first evening, Lo accidentally ducks into Cabin 10 to avoid running into her ex-boyfriend Ben, who’s also working as the photographer for this trip. In that cabin, she briefly encounters a mysterious blonde woman. Later that night, Lo hears a scream, sees a bloody handprint, and witnesses what looks like someone being thrown overboard. When she alerts everyone on the ship, they tell her she must have imagined it because all passengers are accounted for and nobody is staying in Cabin 10.
Here’s where the psychological suspense really kicks in. I love a good “nobody believes me” story where the protagonist questions their own perception of reality. Knightley plays Lo’s mounting frustration and self-doubt perfectly. Everyone dismisses her: they blame her recent trauma, her anxiety, even suggest she’s making it up for attention. The tension comes not from action sequences, but from Lo’s inner turmoil and the uncertainty of what’s real. That slow-building dread and psychological tension is what makes this work as a suspense film.
The pacing of this movie really works for me. It never drags or feels boring, which was my main concern going in. Director Simon Stone keeps the suspense building steadily, and even when I could see where certain plot points were heading, I stayed invested in watching Lo piece together what happened. The focus is on her mental and emotional state rather than physical danger, which is what defines psychological suspense.
Keira Knightley carries this film on her shoulders. She’s in almost every scene, and she brings the right mix of determination, fear, and vulnerability to Lo. I believed her as a journalist who won’t let go of a story, even when it puts her sanity in question. Her performance elevates material that could have felt generic in less capable hands. The way she conveys Lo’s inner crisis as external events pile up against her is what anchors the psychological elements.
The supporting cast is solid too. Guy Pearce plays Richard Bullmer, the billionaire husband, with the right amount of charm and ambiguity. Hannah Waddingham shows up as one of the wealthy guests, and while her role is smaller, she makes an impression. There’s also David Ajala as Lo’s ex Ben, and their complicated history adds another layer to Lo’s emotional vulnerability.
Now, let me talk about the predictability issue. Yes, the overall plot is predictable. If you’ve seen any suspense film about rich people on boats or isolated locations where someone witnesses something they shouldn’t, you can probably guess the general direction this is going. But here’s the thing: predictability didn’t bother me because the psychological tension kept me engaged. The suspense comes from Lo’s perspective and her struggle to convince others of what she saw, not from shock twists.
What I really appreciated is that the movie does throw in some elements that feel different. Without getting into spoiler territory, the way certain characters are connected and the motivations behind the central crime have some unexpected angles. It’s not completely reinventing the wheel, but it’s not just a paint-by-numbers suspense movie either.
The yacht setting looks gorgeous. The production design is sleek and modern, all glass and reflective surfaces that create this beautiful but cold atmosphere. It’s the kind of luxury that looks amazing but also feels slightly unsettling, which works perfectly for building that sense of menace and isolation. That feeling of being trapped on a boat with people who don’t believe you adds to the psychological pressure.
The mystery unfolds in a way that kept me engaged about the specifics, even if I had the broad strokes figured out. Lo keeps finding little clues and pieces of evidence, and watching her investigate while trying to maintain her grip on reality is genuinely tense at times. There are moments where I was wondering how she’d prove what she saw without sounding paranoid.
The movie really picks up momentum as it heads toward the climax. The final act is where everything comes together, and I found myself completely locked in. Without spoiling anything, the reveals in the last portion of the film are handled well, and the emotional stakes feel real.
One thing I appreciated is that the film takes Lo’s trauma seriously. It’s not just a throwaway plot device; her recent experience genuinely affects how she processes what’s happening on the yacht and how others perceive her credibility. That added layer of questioning whether she’s an unreliable narrator because of her trauma makes the psychological suspense more nuanced. The gap between what’s really happening and how Lo perceives it creates that essential tension.
Is this movie going to blow your mind? No. Does it have the depth and complexity of something like Gone Girl or Shutter Island? Definitely not. But it’s a competent, well-made psychological suspense film that understands its assignment and delivers on it. I never checked my phone, I never felt bored, and I genuinely wanted to see how it would end.
The runtime is a brisk 92 minutes, which feels just right. The movie doesn’t overstay its welcome or pad things out unnecessarily. It tells its story efficiently and wraps up at exactly the right moment.
The Woman in Cabin 10 follows investigative journalist Lo Blacklock as she boards a luxury yacht to write about a billionaire couple’s charitable foundation. Still traumatized from witnessing a source’s murder, Lo thinks she’s getting a break with this assignment. But on the first night at sea, she witnesses what appears to be a woman being thrown overboard from the neighboring Cabin 10. When she reports it, everyone tells her she must be mistaken because all passengers are accounted for and the cabin is empty. Despite being dismissed and questioned about her mental state by everyone aboard, Lo refuses to let it go and begins investigating what really happened that night, putting herself in increasing danger as she gets closer to the truth.
My Rating: 7/10
The Woman in Cabin 10 is a solid, entertaining psychological suspense film that doesn’t reinvent the genre but executes its formula competently. Keira Knightley gives a strong performance, the pacing keeps you engaged throughout, and while the plot is predictable, there are enough interesting psychological elements to make it worthwhile. It’s exactly the kind of movie that’s perfect for a streaming night when you want something suspenseful without being too heavy.
Perfect for: Keira Knightley fans, viewers who enjoy yacht suspense and closed-circle mysteries, people who like “nobody believes me” plots, anyone looking for a quick, engaging psychological suspense film that doesn’t require deep analysis, fans of Ruth Ware’s novels, Netflix bingers wanting something suspenseful.
Bottom line: I liked The Woman in Cabin 10 more than I expected to. It’s not going to make anyone’s top ten list, and the story isn’t breaking new ground, but it’s a well-crafted suspense film that kept me entertained the entire time. The predictability didn’t bother me because the psychological tension and the journey were engaging, and Keira Knightley’s performance anchors the whole thing.
The movie flows really well, especially toward the end where everything starts clicking into place. I never felt bored, which was my main concern, and there are enough twists and psychological mind games to keep things interesting even when you see the big picture coming. It’s the kind of suspense film that works best when you’re not overthinking it, just letting yourself get caught up in Lo’s paranoia and determination to prove she’s not crazy.
If you’re a fan of luxury yacht suspense or psychological mysteries where the protagonist’s reality is questioned, you’ll probably enjoy this. It’s not perfect, but it’s a satisfying watch that delivers what it promises: suspense, psychological tension, and a protagonist you can root for as she fights to expose the truth while everyone questions her sanity.
Ready to Watch?
The Woman in Cabin 10 is streaming exclusively on Netflix worldwide.
Perfect for a night when you want something suspenseful without being too intense.