Henry, Jessie, Violet, and Benny used to live alone in a boxcar. Now they have a home with their grandfather, and are joining a baseball team!   Jessie and Violet are selected to play on the local baseball team, Henry gets a job helping the coach, and even Benny has a special role—as batboy. But at this ballpark, there's more than just a game going on—there's a mystery. A special bat is stolen, Jessie's favorite glove disappears, and the team almost doesn't make it to their first game. Can the Boxcar Children solve the mystery and save the team?