Will and Rosie meet as teenagers. They’re opposites in every way. She overthinks everything; he is her twin brother’s wild and unpredictable friend. But over secret walks home and late-night phone calls, they become closer—destined to be one another’s great love story. Until, one day, tragedy strikes, and their future together is shattered. But as the years roll on, Will and Rosie can’t help but find their way back to each other. Time and again, they come close to rekindling what might have been. What do you do when the one person you should forget is the one you just can’t let go?

Three estranged siblings return to their family home in New York after their beloved sister's death in this unforgettable story of grief, identity, and the complexities of family. 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.