With an old Roman coin deep in his pocket: Mark is dreading PE at school. It's not that he doesn't enjoy sports, but that, well, he's not very good at them, and, he hates the way the other children laugh at him. Even Mr Duffy, the class teacher sometimes loses patience with him. Luckily, the Roman coin appears to hold a kind of magic, whenever Mark grips the coin and wishes he was somewhere different, he is strangely transported back to Roman England. A time when the Roman Legions are besieged by Barbarian tribes. To find his way home, Mark must make new friends and find a way through the lands of the Barbarians, but first, he must overcome his fears and lack of confidence. Enemies lurk around every corner. Will Mark be able to reach home safely?