Secret Window (2004) is a suspenseful psychological thriller based on Stephen King’s novella, where a troubled writer (Johnny Depp) is accused of plagiarism by a mysterious stranger. Blurring the line between paranoia and reality, it unfolds as a cat-and-mouse thriller with psychological breakdown and isolated horror atmosphere.

Från IMDB:
A successful writer in the midst of a painful divorce is stalked at his remote lake house by a would-be scribe who accuses him of plagiarism.