In some circles, eleven o'clock at night is considered early. At the Carlisle Arms it is very late indeed, for the paying guests at the Brown Stone front in the East 70s, which is now a genteel boarding house, retire around ten. After that, the musty halls are usually deserted. But now, on the second floor outside one of these rooms, Madame Lorraine is talking to her friend Mrs Kramer, and Mrs Kramer is saying "I wish you wouldn't go prowling around!", but after hearing voices late at night in the back part of the house which is supposed to be shut up, Madame Lorraine is determined to figure out where the voices were coming from...