When a professional hockey player comes to Greenfield with plans to build an ice skating rink, the Alden children suspect that someone in town wants to stop the project.

In The ghost of the chattering bones, while vacationing at a friend's country home, the four Alden siblings try to find a long-missing, priceless brooch and investigate the existence of a ghostly stream. In The creature in Ogopogo Lake, the Aldens visit Grandfather's friend at the Ogopogo Retreat and aided by puzzling clues, embark on a treasure hunt to prevent the retreat from being sold. In The vampire mystery, when the Aldens agree to watch the...

While vacationing at a friend's country home, the four Alden siblings try to find a long-missing, priceless brooch and investigate the existence of a ghostly stream.

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

The mystery of the singing ghost: The Boxcar Children are helping to fix up the house that their cousins have bought. But the house seems to be haunted by a ghost who sings! Will an old diary explain the house's secrets? The mystery of the mummy's curse: Strange things have been happening at the Greenfield Museum ever since an Egyptian mummy arrived for a special exhibit. Could an ancient curse be to blame for all the bad luck? The mystery of Skeleton...

In the first story, the Aldens are excited to be playing in their summer soccer league, until someone begins sabotaging the teams. Next, the Aldens investigate when the new coach of their community basketball league has her Most Valuable Player trophy stolen. Finally, in the third story, the Aldens help out at a minor league stadium and investigate when it appears someone in the ballpark is stealing the home team pitcher's signals and relaying them...

At the request of their distant relative Althea, the Boxcar Children arrive at her old Virginia mansion and investigate the mysterious incidents happening there.

Four orphans find an abandoned boxcar where they live until they are reunited with their grandfather.