An adaptation of the classic series of novels written by Gertrude Chandler Warner. Illustrated by Mike Dubisch, adaptation by Shannon Eric Denton. The series follows the adventures of the orphaned Alden children.

Henry, Jessie, Violet, and Benny have a fun new job: fixing up an old castle! The spooky old place will be turned into a museum, but first the Aldens must figure out why so many odd things keep happening. Keys go missing, strange music comes from a deserted tower, and soon the Boxcar Children discover the castle has an amazing secret!