While staying at an eighteenth-century inn in Vermont, the Boxcar children become curious about the mysterious "accidents" that keep plaguing the owners.
Because Adam hopes that the "big surprise" awaiting him at home has two wheels and pedals, he is unprepared for the unusual addition to his Vermont family.
Travis and his sister Corey decide to boost business at their grandmother's Vermont inn by staging a few "hauntings" that soon draw tourists from across the country, but when their antics awaken a dark force, they must find a way to put to rest the ghosts they have disturbed.
Soup's crazy plan to help his town's basketball team to victory includes constructing a musical instrument called a spitzentootle and snaring the evil Janice Riker in an unpleasant trap.