Corsica, 1993. As a sun-drenched Mediterranean summer heads into full swing, beautiful and brash seventeen-year-old Séverine Guimard is counting down the days until graduation, dreaming of stardom while smoking cigarettes, and seducing boys in her class to pass the time. The pampered French American daughter of a politician, Séverine knows she’s destined for bigger things.

Adela Woods is sixteen years old and pregnant. Her parents banish her from her comfortable upbringing in Indiana to her grandmother’s home in the small town of Padua Beach, Florida. When she arrives, Adela meets Emory, who brings her newborn to high school, determined to graduate despite the odds; Simone, mother of four-year-old twins, who weighs her options when she finds herself pregnant again; and the rest of the Girls, a group of outcast young moms who raise their growing brood in the back of Simone’s red truck.

It was the Crime of the Decade. Pathological sibling rivalry. Bitter, all-consuming envy. Whatever the cause—and everyone has an opinion—it led Georgia Cartwright who was adopted as a newborn, to kill the younger, biological daughter of her wealthy, socially prominent family. Georgia is being kept at an institution where the most violent offenders are held while she waits to see if she is ruled not guilty by reason of insanity.

Birdie is the ultimate summer girl. She’s the daughter of a wealthy real estate developer dad and a social media influencer mom, and this summer Birdie happens to be in big trouble for accidentally crashing her boyfriend’s very expensive car. Birdie’s punishment is to spend the summer with her father at the beach—but it won’t be a vacation. He’s enlisted the help of Cass, whose dad works for him, to keep Birdie on the straight and narrow, including getting her a job at the public beach where Cass lifeguards.

In seven days Jet Mason will be dead. Jet is the daughter of one of the wealthiest families in Woodstock, Vermont. Twenty-seven years old, she’s still waiting for her life to begin. I’ll do it later, she always says. She has time. Until Halloween night, when Jet is violently attacked by an unseen intruder. She suffers a catastrophic head injury. The doctor is certain that within a week, the injury will trigger a deadly aneurysm.