I watched this the other night and loved it -- right up to the end....
*SPOILER ALERT **** DO NOT READ BELOW THIS LINE IF YOU PLAN TO SEE IT***
...where the father-in-law basically explains away what happened and why to the protagonist.
For those of you who read Harlan Corben's book, does it also end like this with a character tidily explaining away how everything came to be before the ending?