"Baseball Joe" Matson's great ambition is to go to boarding school and play on the school team. Joe is a wide-awake country boy who loves playing baseball above all. He and his hometown chum Tom Davis enrol in Excelsior Hall and join the school nine. When not on the diamond, Joe is saving lives and assisting his father against the foes who are once trying to steal Mr. Matson's machinery patents. This is the second volume volume in the "Baseball Joe" series.