This is a typical example of an old dark house murder mystery that were popular in the early 30’s. This one has a young woman returning home for the reading of her father’s will. There’s an ape on the loose that’s murdering the houseguests and there’s a stereotypically scared black porter. The murders turn out to be committed by an enraged servant who’s the illegitimate son of the wheelchair bound uncle. It’s short (60 minutes) and entertaining, so if you’re a fan of the genre and have an hour to kill, check it out.