Math genius Marc Holiday would like nothing more than to be a typical tweener, with friends who come over after school to play video games and a mom who'll bake him his favorite chocolate chip cookies. Yet ever since his mom died, all Marc ever sees is the inside of the classroom at his middle school, advanced math classes at the University of Washington in Seattle, and more studying when he gets home. His stepfather won't let him go anywhere or do anything for fun. But everything changes when Marc meets the mysterious Time Doctor, Dr. Jake Tam, and goes on the most startling adventure of his life. There the eleven-year old Marc Holiday discovers he holds the key to unlocking the galaxy's past and freeing its future ... if he lives through the experience.