Henry, Jessie, Violet, and Benny used to live alone in a boxcar. Now they have a home with their grandfather, and they're playing in a baseball league -- Eagles vs. the Half Moons!While visiting Pikesville, the Boxcar Children join the exciting last games of the season in a strange old ballpark behind an abandoned factory. But the Eagles are hitting too many home runs. Could they be cheating? Then Violet sees strange lights in the factory. Could the lights -- and the home run streak -- have anything to do with the sad Pikesville legend of Home Run Herman? Looks like there's a double-header mystery to solve!