This is not a bad ghost story, though some better editing and a couple of transitional scenes would have helped the viewer a bit. A group of vicious modern pirates board a ship carrying millions of dollars in gold. They aren't satisfied just pillaging; they kill everyone on board in a cold-blooded slaughter. We now go forward three years to a young woman whose twin sister was on that ship. She has that weird connection that twins sometimes do, feeling the terror her sister felt. One night she sees the ship (even though it had been sunk) and boards it. She sees the ghost of her sister and learns the story of the massacre. She is no bent on destroying the guys who were responsible. The rest of the movie involves her gaining revenge. She lives with a priest who took her in when her parents died. Anyway, it is kind of satisfying. There are some elements at the end that just don't work very well, involving a horrible acid that was invented by the doctor on the ship. It's an interesting effort, better than most of its ilk.