Henry, Jessie, Violet, and Benny discover the fun in geocaching as they make new friends and search for hidden boxes around town, but the group soon begins to suspect that one of their new friends may be a thief.
When the Aldens agree to watch the house of a local author who has written a book about a vampire, they end up investigating activities that are suspiciously similar to those in his book.
Henry, Jessie, Violet, and Benny discover that some of the clues to the Great Detective Race are fake and set out to find out who is trying to ruin the race.
The Boxcar Children investigate when everything seems to go wrong for the Greenfield Museum as soon as the Museum displays a four-thousand-year-old ancient Egyptian mummy.
The Alden children help out at the Greenfield Ice Cream Barn and while learning to make ice cream and create new flavors, they help solve a mystery before the Barn gets shut down.