Unreliable Narrator
Telling the story through a character you can't trust, because they are lying, mentally unwell or fooling themselves. At some point, you have to rethink what you were told.
Gone Girl
Amy's diary is the film's main first-person narration. It turns out to be a fake document she built to frame Nick. Every entry you took as a private confession was a performance aimed at the police who would later investigate. This narrator can't be trusted, and she is not fooling herself. She is deceiving you on purpose and with a plan.
The Handmaiden
The story is told from 2 viewpoints, Sookee's and then Hideko's. Each version leaves things out, and the second changes what the first seemed to show. The suspense comes from slowly rebuilding what really happened out of accounts that each leave things out.

