I don't want to reveal too much but the basic story is this: three couples are hiking in Hawaii and one couple out of the trio are bloodthirsty killers. That's it, all I'm telling. You should know that the script by David Twohy is solid and holds up all the way through. The acting too is surprisingly good, with each actor from Steve Zahn ( who according to my pal, ALWAYS BRINGS IT YO)to Kiele Sanchez (Nikki from Lost Season 3) delivering good performances.
However, credit must be given to Twohy is has got to be one of the most under the radar writer/directors in the game. His previous work is full of sleeper hits (Chronicles of Riddick: Pitch Black) and terrible mega bombs (Chronicles of Riddick). Twohy wrote and directed this movie and watching it you get a sense that this is a story teller spinning a yarn that he cares about.
I'm not going to say get ready to have your mind blown, but I don't think you'll be disappointed either.
**Expect another post about Chris Hemsworth, aka Thor who dare I say brings the thunder in this film in the few scenes he's in.