A newlywed couple move into the mansion of the bride's recently dead aunt. Soon strange things begin to happen when the various tenants and servants of the mansion don't want to leave and the bride and groom are in a deadly predicament.
Towards the beginning, the main character's elderly aunt makes a video in which she puts some strychnine into a cup and then presumably drinks it and just sort of closes her eyes. It's not a graphic suicide.
A character wears a N**i officer uniform just kind of randomly? He never says anything antisemitic or anything, but he's wearing it a lot in the movie.