What Lies Below (2020) is a Horror, Science Fiction film that follows a socially awkward teenager is blindsided when her mother introduces her to her new fiancée. At first, his charm, intelligence, and beauty seem too good to be true, and after a series of strange occurrences, the teenage daughter realizes that this new member of their family is not exactly who he seems. Currently, you can watch What Lies Below on Amazon Prime Video, History Vault, Amazon Prime Video with Ads, Amazon Video. Streaming availability may vary by country and platform over time. It has a user rating of 5.3 out of 10 from 209 votes. Fans of horror movies may also want to explore similar titles below.