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 the family 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.

Ali Morris is a professional organizer whose own life is a mess. Her mom died two years ago, then her husband left, and she hasn’t worn pants with a zipper in longer than she cares to remember. No one is more surprised than Ali when the first time she takes off her wedding ring and puts on pants with hardware—overalls count, right?—she meets someone. Or rather, her dog claims a man for her, in the same way he claimed his favorite of her three children: by peeing on him. Ethan smiles at Ali like her pants are just right—like he likes what he sees.

Anna Maria has only known life inside the Pietà, an orphanage for children born of prostitutes. But the girls of the Pietà are lucky in a sense: most babies born of their station were drowned in the city’s canals. And despite the strict rules, the girls are given singing and music lessons from an early age. The most promising musicians have the chance to escape the fate of the rest: forced marriage to anyone who will have them.

Sigrid hates working at the Dollar Pal, but having always resisted the idea of growing up into the trappings of adulthood, she did not graduate high school, preferring to roam the streets of her small town with her best friend Greta, the only person in the world who ever understood her. Her older sister Margit is baffled and frustrated by Sigrid’s inability to conform to the expectations of polite society.

Duchess Day Radley is a 13-year-old self-proclaimed outlaw. Rules are for other people. She is the fierce protector of her five-year-old brother, Robin, and the parent to her mother, Star, a single mom incapable of taking care of herself, let alone her two kids. Walk has never left the coastal California town where he and Star grew up. He may have become the chief of police, but he’s still trying to heal the old wound of having given the testimony that sent his best friend, Vincent King, to prison decades before. And he's in overdrive protecting Duchess and her brother.