Single, childless, cynical J. T. (Jill) Rosen - a poet and college professor who has failed to realize her early promise - lives a careful, orderly life centered around her work and the little house she has inhabited for years. After a tumultuous youth dedicated to the pursuit of romance, she gave up on the possibility of love. Now, in the Midwestern town this former New Yorker cannot bring herself to call home, she has begun to give up even on the possibility of friendship.
When - almost by accident - Jill adopts a nine-week-old puppy, she finds her routines disrupted and her wistfulness about past loves stirred. But as the days and weeks pass, she forges a connection with the dog that takes her by surprise in her solitary middle age.
Dog illuminates the possibilities that Jill's life still offers for goodness, companionship, and love.