After nine years together, Kathryn and Chris have the sort of relationship most would envy. They speak in the shorthand they have invented, complete one another's sentences and help each other through every daily and existential dilemma. When Chris tells Kathryn about his attraction to Emily, a vivacious young woman he sees often at the laundromat, Kathryn encourages him to ask her out on a date--certain that her bond with Chris is strong enough to weather whatever may come.