In the year before they become the orphans known as the Boxcar children, Henry, Jessie, Violet, and Benny Alden live with their parents at Fair Meadow Farm, where, although times are hard, they take in a family who has been stranded in their car during a blizzard.

Four orphaned children make a home for themselves in an abandoned boxcar and are united with their grandfather.

The Aldens are excited to meet their favorite celebrity - Walter the Cat, who makes the funniest videos on the Internet! And when this celebrity cat inherits a million dollars from his owner, he becomes even more famous! But someone seems to be angry about the will and is stealing things from Walter's house. Is this cat too famous for his own good?

While sightseeing in Niagara Falls, the Boxcar children investigate a rash of souvenir store thefts. Includes related puzzles, games, and activities.