The House of the Devil (2009)

Desperate to make some money so she can move into a new apartment, college student Samantha Hughes (Jocelin Donahue) takes a mysterious babysitting job. When she arrives at the house, Mr. Ulman (Tom Noonan) mentions a full lunar eclipse and explains there is no child, but that Samantha will be watching his mother instead. After exploring the sinister-seeming house, Samantha soon comes to realize that her employers are hiding a horrifying secret and have plans to use her, dead or alive.