Mondays are usually boring, but not in class 305. When Mr. Caruthers asks what would happen if Abraham Lincoln never freed the slaves, third-graders Abigail, Jacob, Zack, and Bo know exactly what they need to do. Armed with their trusty time-travel gadget, the friends have exactly two hours to jump back to the past and keep history from unraveling. President Lincoln is feeling overwhelmed and is on the verge of quitting his fight for freedom. The kids must track down the sixteenth president and convince him that his legacy is too important to abandon. It is a race against the clock as the friends navigate the past, dodging obstacles and using their wits to inspire one of the greatest leaders in American history. Travel back in time with the crew and see if they can help Lincoln find his courage before time runs out and history is changed forever.