Babs Magee is causing serious trouble in the past again. The third-grade time travelers are shocked to discover that Babs has actually convinced Benjamin Franklin to quit his work. Benjamin Franklin is not just a Founding Father; he is the brilliant inventor behind the lightning rod and bifocals. If he gives up, American history will be completely ruined. Abigail, Jacob, Zack, and Bo must use their time-travel gadget to find Ben and set the timeline right. The problem is, Babs is always one step ahead of them, making their mission harder than ever. The friends have to race through early American history, tracking down the famous inventor while dodging Babs's sneaky traps. It is going to take quick thinking, deep historical knowledge, and perfect teamwork to stop Babs and ensure Benjamin Franklin's legendary fame is never erased.