In "The Mystery of the Singing Ghost," the Boxcar Children approach their grandfather with a matter of concern regarding the Roth house. Their grandfather, initially worried about their tone, seeks reassurance that nothing is wrong. The children, however, find themselves intrigued by the house, describing it as "funny" in an enigmatic way.

As Violet and Benny elaborate on their feelings, they explain that the strange atmosphere of the Roth house stems not only from its peculiarities but also from the unusual people associated with it. Their curiosity hints at an adventure filled with secrets waiting to be uncovered in their exploration of the mystery surrounding the house.