When Dan Renfrew is accidentally transported to England in the year 1066, he also learns a startling fact. He’s a time jumper, descended from a long line of secret heroes who protect the present by traveling to the past to fix breaks and glitches in the time stream. To get home alive, Dan must try to restore history, but he soon discovers even bigger challenges than suspicious Anglo-Saxons, marauding Vikings, and invading Normans. A band of malicious time jumpers is threatening the very future of the universe.