Snow does something to this city after dark — the boulevards of Boston-Edison go soft and soundless beneath it, and the whole grid seems to hold its breath. Serenity Landscape & Snow Removal works inside that quiet, plowing driveways, clearing front walks and steps, salting the shaded spots where ice hangs on all morning. Quiet is the goal in more ways than one: a property handled before daylight asks nothing at all of the people living there. When the sun finally lifts over the elms, the drive is already open and the walk is already safe. Overnight snow work in the old boulevard neighborhoods.