We run a private hospital in a city in northern Kanto. Unlike large hospitals in cities, it is a small, locally-run business, so I had my wife help out as an office worker. A patient named Nakata, who had been hospitalized in a private room for a long time, was something of a "local influential person" and a "big customer" with many connections... One evening, my wife was asked by the nurse on shift to take the night shift in place of the other nurse, and when she visited Nakata's bed in the private room during her nighttime rounds, an incident occurred...