Barnaby's aunt is in a convalescent home. She is of sound mind and pretty resourceful, but needs to recover. While she is there, people begin to die. We are then introduced to the nurses, the residents, and some family that live outside the old building. We have a whole series of possible suspects, but after a while, their movements seem to be explained satisfactorily. We are deliberately misled by camera angles and shadows. It seems a bit contrived. The place does seem to be rather undesirable in some ways. There are enough bad caretakers to make things a bit dicey. But, of course, we as viewers are being manipulated. The show is called "Blue Herring" but the "Red Herring" is the order of the day. Barnaby comes and goes to visit his Auntie and it takes forever for him to believe that something seedy is going on there. When he does, the results are rather disappointing. Nevertheless, it's decent enough to keep our attention.