Grace's client, Henry Summerstone, has been blind for years. He has no idea of the name of the girl he's trying to trace, what she looks like, where she lives and works; in fact, he's not even sure that she's missing. But he's concerned about the whereabouts of the young jogger who talks to him on his solitary early morning walks, and he's offering cash - an offer Grace finds hard to turn down. Before long, she's got a lead on the girl - several leads as it turns out - though each time she gets close, Miss X slips away. Grace, however, is a girl who knows how to persevere and persevere she does, becoming entangled with squatters, invisible pigs, a twelve-year-old estate agent and the man of her dreams - who unfortunately seems to be the man of his wife's dreams too...