On the occasion of his fifth wedding anniversary, Nick Dunne reports that his wife, Amy, has gone missing. Under pressure from the police and a growing media frenzy, Nick's portrait of a blissful union begins to crumble. Soon his lies, deceits, and strange behavior have everyone asking the same dark question: Did Nick Dunne kill his wife?

As the investigation unfolds, the couple's relationship is revealed through a series of flashbacks. Through Amy's diary entries, the fairy-tale romance they once had slowly unpeels to expose a more disturbing and volatile reality. The search for Amy ignites a media circus, and revelations about the couple's marriage lead to public perceptions that Nick isn't quite what he seems.