No major distributor has released it, but two or three small companies have. This film seems to be in the public domain, which means any distributor can legally sell copies without paying royalties. Beware. Some small distributors market copies of public domain films with poor picture and sound. Others are more reputable and deliver good transfers of the best available prints. Shop around.
In order to qualify to inherit the family fortune, the four heirs, their in-laws, and the household servants must spend the night in the family estate. However, during the night someone starts killing them off.