As the widowed master of an elegant house in Victorian-era London slips slowly into madness and his tyrannical housekeeper takes on more power, a ghostly presence distracts a teenaged maidservant with clues to a deadly secret.
Arthur and his hockey teammates, as well as the ghost of the greatest goalie of all time, help out when Buster worries he'll never be as good a goalie as his hero.
It's time for Moorepark Middle School's annual Demonstration Derby, and Billy thinks he's got it made. All he needs is a little help from his best friend Hoover Porterhouse--the ghost with the most!.