Lost: Via Domus trailer: um, what?

So, a trailer for Lost: Via Domus was released. We watched it and we have no idea what's going on. Sure, the basic premise is easy enough to grasp. People crash land on a deserted island and have to survive. That's easy enough. There's this guy that appears to be the main character. There's some kind of shady conspiracy thing heppening too. Oh, and the lead character gets punched or otherwise beaten a lot. So far, that's about all we can understand. We may just have to catch up on the series now that it's on Xbox Live Marketplace because, honestly, we'd hate to admit we were having trouble following the plot in a video game.