Even very secretive, careful and intelligent people who have taken steps to ensure their privacy during an uneventful evening might be in for a surprise tonight. A man in a suit with a businesslike, strangely fixed smile appears, formal enough to get glances but certainly not out of place enough for attention to dwell on him for very long. Kids only pause momentarily in their playtime, gardeners shrug and go back to their hedges.

The man holds up a card with an address written on it; it matches the door he's standing in front of. He straightens his tie and raps sharply on the door.