The Boxcar Children take a bus trip to the Science and Hobby Fair, but a bad storm forces them to stay at a bus station along the way. Soon they are in the middle of a mystery involving a polluted river, two strange boys, and a suspicious bus station manager.
When the Boxcar Children find a mysterious journal hidden behind the wall of the guest room, it leads them on a search for a valuable coin collection. But what happened to the journal's owner, and what is she trying to tell them?
Dum! Dum! Dum! Saat hujan, Ardha dan Adi iseng menabuh tifa tua yang mereka temukan di gudang rumah Ardha. Mendadak tangan dan kaki Ardha bergerak sendiri, menari-nari mengikuti tabuhan tifa. Adi pun tak bisa mengendalikan tabuhannya. Tiba-tiba kabut putih menyelimuti dan kedua anak itu mendapati diri mereka berada di antara belukar hutan Papua tahun 1800-an. Mereka mengikuti sebuah tim ekspediā¦
At the beach, Benny finds a valuable gold locket and decides to try to find its owner. Soon the children are caught up in a puzzle involving strange visitors at the beach and the mysterious Miss Smith, who seems to live along in the big Tower House nearby.
A family moves into the house next door! The Boxcar Children decide to make friends with their new neighbors by building a tree house with them. In the process, they notice a window in their neighbor's house that nobody knows about. Does the old home have a secret?
A sudden snowstorm traps the Aldens in a mountain cabin! The cabin is cozy, but the children hear strange noises at night and find a coded message carved into the closet door. Can the children crack the code and solve their snowbound mystery?
Floating down a lazy river, Benny finds a blackmail scheme in progress.
A trip in a caboose at the end of a freight train leads to an old clown and a search.
The Aldens' friend Max says nothing interesting happens in Port Elizabeth. But when the children visit the small fishing village and come across a man snooping around the local library, they prove that every town has its mysteries.
Relates the adventures of the Alden family as they climb Old Flat Top Mountain.