On a humid summer day in Alabama, a mayor’s wife turns up brutally murdered under a railroad bridge. Standing next to her body is fourteen-year-old Mason Hill, the autistic son of former Miss USA Genevieve Hill. The locals are quick to level their verdict on young Mason: he did it. The town detective calls in local autism expert Casey Walker to consult on the case. At first, Casey tries to keep an open mind. But the more time she spends with Genevieve, the more her unease grows, and she suspects that Genevieve is doing more than just protecting her son.

They never considered how his wife might react, or that by the end of the summer a man would be dead. But Blakely always got her way, and the others followed her lead—even when they knew it was dead wrong. The girls had been friends from day one at Camp Pendleton, a haven for gifted children. But their senior summer was different. When Mr. Crosby, the handsome tennis coach, wound up murdered after a reckless lie, Blakely, Grace, Meg, and Thera swore themselves to secrecy. And never spoke to each other again.

When Heather McKinley dreamed of becoming a doctor, she imagined curing sick kids and sporting pink stethoscopes. She never anticipated the sleepless nights, grueling exams, and endless labs. And she certainly never knew that her medical school earned the nickname Dead Med thanks to the tragic history of students overdosing on illegal drugs. But Heather would never consider doing anything like that. That is, until her longtime boyfriend dumps her, she finds herself failing anatomy, and her world starts to crumble.

Sydney Shaw, like every single woman in New York, has terrible luck with dating. She’s seen it all: men who lie in their dating profile, men who stick her with the dinner bill, and worst of all, men who can't shut up about their mothers. But finally, she hits the jackpot. Her new boyfriend is utterly perfect. He's charming, handsome, and works as a doctor at a local hospital. Sydney is swept off her feet. Then the brutal murder of a young woman—the latest in a string of deaths across the coast—confounds police. The primary suspect? A mystery man who dates his victims before he kills them.

Joanne knows how lucky she is—Richard is a wonderful husband, Evie is the most gorgeous baby girl, they live in a beautiful house—life couldn't be better. But then Richard's twenty-year-old daughter Chloe turns up. Chloe hasn’t spoken to her father since the day he married Joanne two years ago. But with the arrival of her baby sister Evie, Chloe wants to make peace. Richard is delighted, and since Joanne is struggling with the new baby, he suggests Chloe could move in and help.