Cal Bradley just wants his life to be normal. He wants to complete his history project--not travel back in time and become part of it. He dreams of being Most Valuable Player for his middle school basketball team--not causing his rival never to have been born. And he longs to forget about the eighteenth-century pirate that he accidentally caused to time-travel. Instead, Cal must risk his life to save him.

When Cal finds an old wooden box, he has no idea that it hides a special gold medallion that is about to change his life forever. The medallion seems to have a mind of its own, and certainly has all kinds of plans for Cal as it takes him and his friends on a journey that they never could have imagined. Along the way, Cal learns about himself, about helping friends, about taking responsibility. And he discovers that even his enemies are real people, too.