Summerhills continues the story of the lives and loves of the Ayrton family, in particular that of Major Roger Ayrton M.C., his brother and three young half-sisters. Roger has made the Army his career. Anne has settled down as housekeeper to old Mr Orme, the rector. Nell looks after the old house, and it is upon her that the comfort and well-being of the family depend.
A new generation is growing up. The story begins as Roger flies home to Amberwell on leave, full of plans for his family and home.