Frank and Joe Hardy introduce their new mystery.

Frank angers Joe by spending all day on the phone with girls so Aunt Gertrude sends Joe on an errand with Iola.

Joe and Iola discover several underfed farm animals but cannot find a farmer.

Joe finds muddy footprints and fresh milk while Iola is warned to stay away from the property. Iola alerts Frank.

Joe searches the house and barn. Frank arrives but is spooked while looking for Joe.

While running from the farm, Frank and Joe encounter someone who becomes their new client. Later, they discover what is to become of the animals.

Frank and Joe return to the farm but are soon joined by a man in a truck.

The boys conclude that someone, maybe even a ghost, has been helping the animals. They create a plan to catch a ghost.

The boys' plan to catch the ghost works too well and the ghost wants to know what the boys know about the animals.

Eric finds the boys at the farm and worries he's getting them in trouble. But before they leave, the ghost finds Lacey's will and sneaks it to Joe. Back home, Mr. Hardy and Mr. Binks try to determine its authenticity but Joe isn't so sure.