Deborah slowly discovers that Dan may not be the thrilling inventor he claimed to be back in 1776, and questions their budding relationship. To get her back, Dan resorts to desperate (and alarming) measures. Meanwhile, Chris is under intense scrutiny from his mentor, Dr. Cobell, as he works to finally achieve tenure at the university.
Dan and Deb head back to colonial times to rescue Chris and help spark the Revolutionary War. Dan and Chris are forced to go undercover as British allies as they simultaneously try to rally the colonists to revolt in the Battle of Lexington. Unexpected friendships are formed and history is remade.