This book is about the trials of a time traveling nineteen year old named Jackson. One day, he and his girlfriend, whose name is Holly, are sitting in her apartment when two people burst in the door. They then shoot Holly and tell Jackson to "jump" or time travel. He jumps back to 2007, which is way farther then he has jumped back before. But this jump is different. He is stuck in 2007 and can't get back to 2009. The rest of the book involves him trying to get back to 2009 and save his girlfriend.