A nor'easter reaches Rowley off Plum Island Sound with salt already in it, and the plowing starts long before the first train pulls in off Route 1A. All Weather Exteriors LLC works a storm while it is still happening — one pass, then another, so a driveway never gets ahead of the truck. There is a particular pride in a drive that is clear and square-edged at six in the morning, banks pushed back where they belong, the walk swept down to the step. The town wakes up able to leave. That is the whole of the job, and it is enough.