Exit

Exit (Korean: 엑시트) is a 2019 South Korean disaster comedy film written and directed by Lee Sang-geun, and starring Jo Jong-suk and Lim Yoona. The film follows the story of a grown man who attempts to reconnect with an old crush, but following a chain of events, they end up trying to escape from a mysterious white gas that threatens to engulf the entire Seoul district.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.