Watch What Lies Below (2020) Online

A single mother meets her 16-year-old daughter Libi after summer camp and they both go to a forest house by the lake, where a girl is waiting for her: her mother meets a man and is going to marry him . The potential stepfather - a tall and handsome man and even a scientist - at first likes Libi curious and even very much, but soon the girl notices strange things behind him.