We just watched Kill List in movie club and boy is it intense---Steve's head is still reeling.
I don't want to give much of the mystery away, so I'll keep this short: It's an intimate portrait of two hitmen---both ex-military, one with wife and kid---and their descent into brutality, madness and the occult.
You have till this Thursday to see it.
Here's a review from NPR (contains spoilers---don't read if you want to watch the film).