Imagine an experiment that goes wrong! You're trying to test a new form of transporter, but instead of moving objects from place to place, they move through time as well - only in this experiment, you are the object! That is precisely what happens to Mark as he lands in the middle of the most famous battle in American history! Follow his and Andy's adventures as they relive the final day of the Battle of Gettyburg and discover what may have happened if history was changed!