It’s about a maid (or nanny) who comes to work for the lady of the mansion and her daughter. I think the lady of the mansion is pregnant and her husband is not home.
Somehow the maid discovers something strange that is going on with the house and (this part is maybe the maid's imagination) she discovers a lift inside the house that brings her to an underground lab where people are cut up.
The final scene is of the owners vacating the house and the daughter going back to the house to retrieve something from a room and seeing the maid rocking a baby back and forth. Both the maid and baby have white eyes (with no iris).
I know the details are fudged but this is the best I can remember! The last scene details are correct though.