A knife, what an instrument a knife is in the hands of a skilful surgeon. Dr Alexander Gibson was a surgeon, of the highest calibre. Evwen professor Dana Williams spoke of hi as one of the three most capable men he had ever had the honor to teach, thus ranking him with his colleagues, Dr McGill and Dr Nelson. Dr Gibson and Dr McGill have a heated argument over a patient and shortly after Dr McGill is murdered but not before his arm is severed. Who is the murderer and why would he want to amputate his right arm...