Ruth and Peter O. Jones are in New York for a convention at which he is a speaker. Because Peter’s sister cancelled her babysitting gig at the last moment, they have had to bring their nine-year-old daughter, Bunny, with them. The elevator man hears them talking about where to find a babysitter and volunteers his niece, Nell. Once Ruth and Peter leave, though, Nell begins to behave strangely.
Jed Towers is on his last date with his girl, Lyn, before moving across country to take a new job. They have a spat, however, and Lyn walks out. Jed goes back to his hotel determined to find another date for his last night in town. Across an open courtyard, he sees a girl in the opposite window, who seems to be inviting him over.
I can’t say more about this novel without giving away the plot. Suffice to say, it builds up a great deal of suspense as one guest after another starts to worry about what is going on in that room on the 18th floor.