"Nick" (Ben Affleck) appears to have a wonderful life with his beautiful and clever wife, "Amy" (Rosamund Pike), until he arrives home one night to find a broken table and Amy gone. The police arrive, along with "Boney" (Kim Dickens) and "Gilpin" (Patrick Fugit), and they quickly become suspicious of what's happened. Along with her parents, they go through the motions of public appearances but can’t get any answers. Then law enforcement starts questioning Nick’s account, and that doubt grows when some carefully placed clues come to light suggesting he is unfaithful and that Amy feared for her life. As more evidence surfaces, it seems unlikely that "Nick" is innocent; with help from his practical sister "Margo" (Carrie Coon), he hires well-known lawyer "Bolt" (Tyler Perry) to investigate the situation. They are not quite as ready as they need to be for what they uncover, although this proves true also for "Collings" (Neil Patrick Harris). As we find out more about who did or didn't do what to whom, it becomes clear that there’s a complicated tangle of lies, trickery and outright wickedness at play. I think this is Affleck's strongest performance because his character has a lot riding on the outcome, and as things get intense he really commits to the story. Pike also delivers an excellent performance as the devious "Amy," who demonstrates a remarkable ability to manipulate people on a large scale. There are some interesting appearances from Reece Witherspoon’s television talk show host whose guiding principle seems to be “never let facts interfere…” The adaptation of her own novel allows Gillian Flynn and David Fincher to get every last drop out of an ensemble cast that embodies almost every harmful sexist stereotype the media can create and promote. Honestly, I wasn't thrilled with how it ended; somehow I felt it diminished what had come before. However, for the preceding two and a half hours, it truly keeps you engaged.

Source on TMDB