A Harvard professer, and his step daughter enjoy an evening at home. When some sleeping medicine gets mixed up, the mom is given the wrong bottle, and dies. A week later, Mr Keen comes calling. The daughter is upset, since she was the one who gave the deadly dose. The professor is, well, absent minded.
The house keeper pulls Mr Keen aside, and seems to have some dark secrets to share. What’s going on in the household? The plot thickens when the house keeper disappears. Can Mr Keen solve this mystery before any more bodies pile up?
When Mr Keen starts looking into some history behind the kindly old professor, it should become obvious who the killer is. Listen in, and see if you think so too.