Mystery lovers, mark your calendars. Dark Places, the 2015 thriller starring Charlize Theron, is set to stream for free on Plex starting November 1. Based on Gillian Flynn's bestselling novel, this film offers a dark, twisting tale that will appeal to anyone who devoured Gone Girl—and it's arriving just in time for cozy fall viewing.

Flynn wrote Dark Places three years before Gone Girl, and while the latter became a cultural phenomenon, Dark Places remains a hidden gem in her bibliography. The novel has earned over 823,000 ratings on Goodreads, a testament to its enduring popularity. The film adaptation, directed by Gilles Paquet-Brenner, brings Theron into the role of Libby Day, a woman who survived a brutal family massacre as a child and now, decades later, must confront the truth about what really happened.

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The movie arrived just one year after the Rosamund Pike-led Gone Girl, which grossed over $370 million worldwide. Unfortunately, Dark Places didn't enjoy the same commercial success, earning only $5.6 million against an $11.9 million budget. Critics were also harsh, with the film earning a meager 22% approval rating on Rotten Tomatoes. One critic called it "just plain awful," while another described it as "an apathetic film with no fire in its belly."

Despite the critical drubbing, Dark Places has found a second life among streaming audiences who appreciate its atmospheric tension and Theron's committed performance. The film also features a strong supporting cast, including Nicholas Hoult and Christina Hendricks, adding depth to the grim narrative.

For fans of the mystery genre, this free streaming debut is a chance to revisit a story that, while flawed, offers a compelling look at trauma and survival. If you're in the mood for something darker, you might also enjoy Prime Video's darkest military thriller or these forgotten thriller gems.

As streaming platforms continue to churn out crime dramas—from Agatha Christie's Seven Dials to the latest Knives Out mystery—Dark Places stands out as a raw, unsettling adaptation that doesn't shy away from the bleakness of Flynn's source material. It's a perfect pick for a rainy afternoon, especially if you've already exhausted the latest Harlan Coben adaptations on Netflix.

So, set a reminder for November 1. Dark Places will be available for free on Plex, and it's a worthy addition to any mystery lover's watchlist. For more streaming recommendations, check out why Mare of Easttown is the perfect HBO binge or Anya Taylor-Joy's The Northman still rules streaming.