Landmine goes click (2015)

Not really what I'd normally call a horror film but more of a thriller than anything else. It is a good film in my opinion. The setting is somewhere in Europe and 3 friends are off on a camping holiday. The attractive blonde girl of the three is loved by one of the men but not the one who she is in a relationship with. I think the man in love with her had sex with her but hasn't told his friend. This forms part of the twist later on. It's a hard film to describe without going into the exact detail of it all.
Most of the film is taken up with the problem that one of the guys happens to have stepped on an old landmine that hadn't been cleared up from the war several years ago (in Serbia?). I'm not sure why it wouldn't just automatically blow him up but I'm not a landmine expert. His male friend abandons them, leaving him with the girl he loves. Now, all seems redeemable when a stranger comes along. However, this stranger is an absolute bastard. He strings them along, promising to help but infact does everything but help. He humiliates the girl and eventually rapes and murders her. All while the guy stands on the landmine. You might assume the film ends there but no. There is an ending. I would have wanted the guy who abandoned them to get his just rewards but no, that wasn't part of the ending, instead it was passing stranger who gets it. I won't spoil it but lets just say it ends quite darkly.
A strange little film that is well made and well scripted. It's difficult to watch at times but I can tell there was good craft on display in making it. The acting is superb. Well worth a watch if you can stomach it.