The three Blue sisters are exceptional—and exceptionally different. Avery, the eldest and a recovering heroin addict turned strait-laced lawyer, lives with her wife in London; Bonnie, a former boxer, works as a bouncer in Los Angeles following a devastating defeat; and Lucky, the youngest, models in Paris while trying to outrun her hard-partying ways. They also had a fourth sister, Nicky, whose unexpected death left Avery, Bonnie, and Lucky reeling. A year later, as they each navigate grief, addiction, and ambition, they find they must return to New York to stop the sale of the apartment they were raised in.

But coming home is never as easy as it seems. As the sisters reckon with the disappointments of their childhood and the loss of the only person who held them together, they realize the greatest secrets they've been keeping might not have been from each other, but from themselves.