2023’s Knock at the Cabin is underpinned by a deep meaning, one that, when explained in full, reveals just how cerebral yet bleak the M. Night Shyamalan movie truly is. Co-written by Steve Desmond and Michael Sherman, Knock at the Cabin sees Shyamalan back once again, telling a story of an apocalyptic situation. However, unlike Signs or The Happening, the characters in Knock at the Cabin know they have the power to stop the collapse of civilization it’s what they must do to achieve it that makes the movie so harrowing.

https://screenrant.com/knock-at-the-cabin-movie-ending-explained/