Did Betsy Ross really sew the first American flag? Babs Magee wants to take the credit for it, so Abigail and her friends travel back in time to set history straight.
Abigail, Jacob, Zack, and Bo travel back in time to meet George Washington and try to convince the stubborn general to continue fighting the Revolutionary War in Valley Forge.
Abigail and her third grade friends travel back to the past once again on a mission to convince Sacagawea, a teenage Native American who served as a guide for Lewis and Clark, not to give up on her dream.
When Abigail and her friends in the History Club learn that their rival Babs Magee has convinced Benjamin Franklin to quit, they must make an emergency trip back in time to convince him to become the man he is supposed to be.
Abigail and her friends travel to the past on an urgent mission when their time-traveling teacher returns from the mid-nineteenth century to report that President Abraham Lincoln is thinking about quitting, leaving the issue of slavery unresolved.