The Alden children are helping out at a radio station, and they're going to be actors in a live mystery show. But when strange things keep happening, people in town say the station is haunted. Can the Boxcar Children catch the radio ghost before the station's listeners are scared away?
While the Aldens are visiting a friend of Grandfather's at the beach, Benny finds a long-lost piece of a map to a legendary pirate treasure, a discovery that brings unwanted attention from fortune hunters.
The children are competing in an invention convention held in the home of a famous inventor known for her one-of-a-kind clocks, and it appears that the clock-bongs aren't the only noises at midnight, as something else is also making a mysterious tapping sound.