The Alden's neighbor, Lina, thinks there's treasure hidden in her attic and she wants the Boxcar Children to help her find it. Of course, the children are eager to help search—but it appears they aren't the only ones looking for the treasure.

The Aldens visit Grandfather's friend at the Ogopogo Retreat and aided by puzzling clues, embark on a treasure hunt to prevent the retreat from being sold.

"The winter sports season is here, and the Aldens are excited about all the snow activities--especially snowboarding. But soon they find themselves in the middle of a mystery surrounding a star athlete and a stolen snowboard"--

"The Aldens visit the shore in New Jersey and help out at an amusement pier that is rumored to be unsafe"--

"A local shop owner lost his memory after an accident. But someone from his past is holding a grudge. Can the Aldens help piece together the man's past?"--Provided by publisher.