Here is the backstory, in a nutshell (taken from a blog). highlight the area below to see the spoiler. It doesnt really ruin the movie, but it will take away some of the mystery.


Rob (one of the main characters of the movie) got a job offering from a company in Japan named Slusho! which is a subsidiary of another Japanese company called Tagurato. Tagurato is an oil company, which means that they have oil rigs in the ocean. Slusho! has a special ingredient that makes people want to drink more of it. That special ingredient comes from the bottom of the ocean. Apparently, a piece of a Japanese government satellite called ChimpanzIII fell off, and Tagurato is trying to find and identify the object that fell. It is speculated that while trying to find the object, they awoke a monster that is thousands of years old. This is the monster that attacks New York.