Never explore an ancient Egyptian tomb. That was the first rule of adventuring. It was right before never, ever pick up the ancient artifact inside and quickly followed by don't get sent back in time. Luke Peters did all of those things. 
Now, this college student turned magic-flinging werewolf has a choice. Will he use his newfound powers to stop a gang of escaped mummies, rescue a priestess and the goddess she serves, and defeat an ancient evil from taking over Egypt? Or will he leave the world to its fate? 
Yeah, he didn't think it was much of a choice either.