The Aldens are visiting friends for a big Dia de los Muertos celebration. The kids love learning about the holiday and helping out that is until mysterious events threaten to ruin everyone's preparations.
The four Alden children, aged six to fourteen, volunteer at the new recycling center in town, and help uncover who is breaking in and making a mess each night.
The Alden kids are sabotaged when they compete in a new game show that involves a camera crew following them around Philadelphia as they compete with another brother-sister team in a search for clues.
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.
A talented young soccer player in Greenfield is given the honor of being a child mascot at an international soccer tournament in Brazil, but when an anonymous letter insists that she doesn't deserve to go, the Aldens investigate.
While staying at an eighteenth-century inn in Vermont, the Boxcar children become curious about the mysterious " accidents" that keep plaguing the owners.
