Water Monster

Monstrum (Korean: 물괴) is a 2018 South Korean period action horror film directed by Heo Jong-ho. It stars Kim Myung-min, Kim In-kwon, Lee Hye-ri and Choi Woo-shik. The film was released on September 12, 2018. It was chosen to compete in the Sitges International Fantastic Film Festival, screening there on 13 October.