Newly separated Hannah Peterson thinks she's found the perfect little apartment to start her new life. She loves its unusual character and her landlords, who live right downstairs, are cool and very friendly. Paige and Nate Rawlings are everything Hannah wants to be in her new life: edgy, trendy, and arty. They are also deeply in love, as Hannah hears every night through the heating vents.

Overhearing her landlords' active love life has Hannah longing to jump-start her own. Dating for the first time in decades and navigating the apps has been a nightmare. She doesn't know how many more mediocre men she can take. It's almost enough to send her running back to her husband, Tom, who'd take her back in a heartbeat.

Hannah longs for what Paige and Nate have but is torn when she realizes they're willing to open their bedroom and share it. That sort of thing just isn't done in the suburbs where Hannah's spent most of her life. The Rawlings offer forbidden temptations but accepting them just feels wrong. When the landlords finally seduce the proper suburban wife, she can't help but surrender.