Henry, Jessie, Violet and Benny are spending the summer in an enormous New England farmhouse where their grandfather grew up. The children must find out the truth about a devastating fire and a secret dating back to the Revolutionary War.

The classic story of four orphaned siblings, Henry, Jessie, Violet, and Benny, who find an abandoned boxcar in the forest and decide to make it their home--

Summer vacation on an almost private island gives the Aldens a challenge. Henry, Jessie, Violet and Benny used to live alone in a boxcar. Now they have a home with their grandfather and are spending the summer on their own private island. There is a mysterious stranger on the island with a secret--but that's not the only surprise in store for the Boxcar Children.

The Aldens head back to Mystery Ranch for another summer! They are thrilled to learn their friend Mike has moved to Yellow Sands--a new town nearby. But when a house fire breaks out and Mike is blamed for starting it, the Aldens must find the real culprit to help their friend.

The Aldens search for carousel horses that have disappeared from an amusement park.