
Rachel, an alcoholic divorcee, becomes obsessed with a couple she watches from the train every day. When the woman goes missing, Rachel becomes entangled in the investigation.
A divorcee becomes entangled in a missing persons investigation that promises to send shockwaves throughout her life. As she tries to uncover the truth, her unreliable memory and past mistakes complicate the case.
The film simplifies some character backstories to focus more on the thriller aspect. The ending is slightly altered to provide more closure. Some secondary characters are combined or omitted for pacing.
The film balances well between staying true to the book and adapting for cinematic pacing, making it enjoyable both as a movie and a complement to the novel.
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