Antrum: The Deadliest Movie Ever Made is a 2018 mockumentary-style Canadian horror film that gained a cult following in 2020. The story, presented as a "cursed" 1970s film, follows two siblings who enter a forest to dig to hell to rescue their deceased dog's soul. Known for its 1970s aesthetic, the movie is a slow-burn, atmospheric experience that explores themes of grief and trauma rather than jump scares.