Wealthy spinster, Rachel Innes rents a country house with her niece and nephew for the summer, only for a series of strange occurrences and a murder at the house's circular staircase to lead to shocking revelations about the home's owner and the family secrets within the house.
| Actor | Role |
|---|---|
 Eugenie BessererAunt Ray | Aunt Ray |
 Guy OliverHalsey Innes | Halsey Innes |
 Stella LeSaintGertrude Innes (as Stella Razeto) | Gertrude Innes (as Stella Razeto) |
 Edith JohnsonLouise Armstrong | Louise Armstrong |
 Anna DodgeLiddy | Liddy |
 Jane KeckleyMrs. Watson | Mrs. Watson |