Backstage with a Ghost

After a sandbag falls on a building inspector's shoulder—the latest in a string of suspicious accidents—kid detectives Brian and Sean Quinn decide to investigate. Sean's friend Sam suspects it is the work of the ghost of Horatio Hamilton, an actor who died in the theater decades before, but Miss Beezly—the strange old woman who runs the theater—says that Horatio's ghost is too polite for such misbehavior. Someone is pulling these dangerous pranks, and Brian and Sean better find out fast—in case the next sandbag falls on a detective!