Torment (2013)

Newlyweds Cory and Sarah Morgan take Cory's 7-year old son Liam up to the country for some much needed family time. When it appears as if Liam has run away, psychological suspense becomes straight-out horror, as Sarah and Cory must now confront a sadistic cult-like family who have been hiding in the house all along and have taken Liam for themselves.