A couple for 30 years, Kim and Grant’s "separate but together" partnership is running up against the realities of late middle age: Grant’s mother has died, the college where he taught philosophy was shuttered, and their twin girls are grown and gone. Escaping the bitter cold of a Midwestern winter for the hot desert sun of Palm Springs seems as good a solution as any to the more intractable problems they face. When they arrive at Le Desert, a quirky condo community, Kim immediately embraces the opportunity to make new friends and explore a more adventurous side of her personality. Meanwhile, Grant struggles to find his footing in this unfamiliar landscape. When Grant goes missing on a hike in the Palm Springs mountains, Kim is forced to consider two terrifying outcomes: either Grant is truly lost, or this time, he has really left her.