The chief character in "Lancaster Gate," Lisa, a thirty-five-year-old teacher, is for seventeen months the mistress of a wealthy forty-five-year-old married man whose name is never mentioned in the story. He has no intention of leaving his family, as a third child is about to be born. Lisa regrets the huge scene that she makes when he announces a week-long business trip to London and neglects to invite her. Her hysteria shakes him and earns her the invitation. She meets him at a service station on the London Road, fearing that he will stand her up for the drive into the city.