In the beginning I thought of giving it 1 star. It was so slow paced, I felt like watching another movie instead. But I did move further and further. Plot reminded me a little of other movies. Guys from expedition are trapped in a cave and almost no one survives. But to all that, here is a boy who's dad is a real walking nightmare. He doesn't know his dad as a person until they get trapped together. I must say the end made me think of giving it 3 stars. It was very sad and touching. But then it's only because the ending was sad I can't give the whole movie 3 stars. It is worth watching, but don't have high expectations from it.