"Gone Girl" is not based on a true story; it is a fictional novel written by Gillian Flynn, who also adapted it into a film directed by David Fincher. The story revolves around the disappearance of Amy Dunne and the ensuing media frenzy and police investigation, which reveals complexities in her marriage to Nick Dunne. While the narrative explores themes of deceit and public perception, it is a work of fiction and not inspired by actual events. The book and film have garnered critical acclaim for their psychological depth and commentary on relationships.

In "Gone Girl," Amy Dunne exhibits traits associated with several psychological issues, primarily displaying characteristics of **borderline personality disorder (BPD)**. This is evident through her unstable relationships, intense emotional responses, and manipulation of those around her. Additionally, she demonstrates traits of **psychopathy**, as she is calculating, deceitful, and lacks empathy towards others. These traits culminate in her elaborate scheme to frame her husband for her disappearance, showcasing her complex psychological profile.

"Gone Girl," directed by David Fincher and based on Gillian Flynn's novel, explores themes of media manipulation, marriage, and identity. The story follows Nick Dunne, who becomes the prime suspect in his wife Amy's disappearance. The narrative reveals Amy's elaborate plan to frame Nick as revenge for perceived betrayals. The film critiques societal expectations of marriage and the media's role in shaping public perception. Ultimately, it examines the darker aspects of love and the lengths individuals will go to control their narratives.

In "Gone Girl," the major twist is that Amy Dunne, played by Rosamund Pike, has orchestrated her own disappearance to frame her husband, Nick Dunne, for her murder. Amy meticulously plots the scheme as revenge for Nick's infidelity and perceived betrayal. As the story unfolds, it reveals her manipulative nature and the lengths she will go to control the narrative and punish Nick. This shocking twist unveils the dark complexities of their marriage and commentary on media sensationalism, gender roles, and public perception.