I strongly recommend watching this film without knowing anything about it, including opening the above link, so I won't give any details away.
To start with, it seems pretty hammy, complete with awkward Australian/American accents, Russell Crowe-style, and the C.G.I. sea is really poor. However, once it got going I forgot about all of that and enjoyed it. I am pretty sure that it does not hang together properly (and the vague way the director talks about it seems to confirm that) but I can't be bothered to pick out the plot holes as conversely there is no doubt a convoluted explanation possible for everything. What is the point of Heather, though?!