Rachel Whalen and a Ariel Alexander have been friends for more than a decade. Despite their differences--down-to-earth Rachel owns a local hair salon; Ariel is a vivacious former TV star determined to hold onto her looks--they've helped each other navigate single motherhood, banding together against the soccer moms of Timbergrove, Oregon. Yet lately, Rachel wonders about Ariel's increasingly erratic parenting and her clandestine love life. And Rachel can't reveal to anyone, even Ariel, how much she worries about her sullen, distant, younger son. When an unthinkable tragedy separates the two families, Rachel desperately tries to understand what went wrong. But as her assumptions are ripped away one by one, she must confront shattering revelations about the people she trusted and the suburban world that once seemed so safe.