From what I remember reading (It's been about...holy shit, like over a year now, whoa) essentially the story revolves around a rival investor trying to steal Dinosaur eggs, in an attempt to one-up Hammond. Really, what ends up happening for the most part is the kids stow away onto the island in a trailer (Which we of course have seen, including the best part of The Lost World), but they never FIGHT dinosaurs. They see most of the action on surveillance screens. Also, Lex is actually based a lot on the girl in the second movie (The entire dynamic between the kids is) and the computer system navigation by Lex in the first movie is actually taken directly from The Lost World..