When Abigail Doorn was wheeled into the operation room at the Dutch Memorial Hospital, her face was strangely blue and bloated. A wire had been tightly wound around her neck. The strongest suspect, because he stood to benefit by the death of this wealthy old woman, was her protege, the famous Dr. Janney. Just before her death he received a strange caller--one whose name he would not divulge. Ellery Queen, having come to the hospital to visit his old...