A mysterious death, later found to be murder by poison, takes place at a hotel during a convention of doctors. Hotel detective McCabe (Victor McLagen) is on the case, unfortunately for him the rather annoying crime novelist Blackwood (Edmund Lowe) also wants to be on the case and competes with McCabe to solve the case. As the hotel is full of doctors who know the poison involved that means that are no shortage of potential suspects...
An enjoyable film with a well matched pair tackling the crimes, with a good mixture of suspects and red herrings. The film can be a bit confusing at times and does seem to end rather abruptly.
