I think I approached this film with the wrong attitude because I had the wrong impression. It's more of a drama, but I was expecting a horror, and the children featured on the front are only really at the end.
In a nutshell, I couple who have lost their child travel to a remote island where the woman believes her child to be. The film is more about their journey there, it isn't an action packed gore fest, the more I thought about it afterwards, I found it to be a film about motherhood. It's about the mother's relentless desire to regain her maternity and fill the space of her lost son, and the mutual longing to regain this link shared by the primal orphans that live as a tribe in the jungle lures her in regardless of the consequences, ie the strain in places on her relationship with her husband, and their safety.
Not expecting this, I found the film a little tedious because I was waiting for the horror stuff to start, but had I known what the film really was about, I would have enjoyed it far more, and now that I know this, I have a big appreciation for the story. It does have a horror element, it's creepy, and sinister, and is quite original as far as I am aware and think it deserves another good review to perk up it's rating average.