Henry, Jessie, Violet, and Benny used to live alone in a boxcar. Now they have a home with their grandfather, and they are trying to catch a runaway ghost!   When the Aldens visit their friend Fran in Wisconsin, they can't wait to hear her tell the story of the runaway ghost. Fran's family ghost hasn't been spotted in years, but the Aldens still shiver at the spooky tale of the ghost's bell clanging after dark. Then Violet hears a mysterious ringing

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The Aldens investigate when an old wooden mask they have found is stolen

"The Aldens visit the shore in New Jersey and help out at an amusement pier that is rumored to be unsafe"--

The Aldens investigate the rumors of ghosts, disappearing props and a haunted seat in the Trap-Door Theater

The Aldens discover there's nothing more fun than a drive-in movie. But pranks and other odd things are happening at the Diamond Drive-In, and late at night, a ghost is seen walking around the empty lot. Is the old theater really haunted?