Kay (Meryl Streep) and Arnold (Tommy Lee Jones) are a devoted couple, but decades of marriage have left Kay wanting to spice things up and reconnect with her husband. When she hears of a renowned couple's specialist (Steve Carell) in the small town of Great Hope Springs, she attempts to persuade her skeptical husband, a steadfast man of routine, to get on a plane for a week of marriage therapy. Just convincing the stubborn Arnold to go on the retreat is hard enough the real challenge for both of them comes as they shed their bedroom hang-ups and try to re-ignite the spark that caused them to fall for each other in the first place.