After their father is murdered under mysterious circumstances, the 3 Locke siblings and their mother move into their ancestral home, Keyhouse. There are many magical keys inside the mansion that belonged to their father. The 3 children explore the mysteries of the house and set a demon free by mistake. This creature then tries to kidnap them.
IMDb — 7.4
Really?
https://www.imdb.com/title/tt5753856/