When Anna Cicconi arrives to the small Hamptons village of Herron Mills for a summer nanny gig, she has high hopes for a fresh start. What she finds instead is a community on edge after the disappearance of Zoe Spanos, a local girl who has been missing since New Year’s Eve. Anna bears an eerie resemblance to Zoe, and her mere presence in town stirs up still-raw feelings about the unsolved case. As Anna delves deeper into the mystery, stepping further and further into Zoe’s life, she becomes increasingly convinced that she and Zoe are connected.

Kay Donovan has skeletons in her closet, but who doesn't? The past is the past, and now Kay's a star soccer player whose group of gorgeous, pedigreed friends run their private school with effortless popularity and acerbic wit. But when a girl's body is found in the lake, Kay's carefully constructed life begins to topple. The dead girl has left a memento, a computer-coded scavenger hunt, which, as it unravels, begins to implicate each of Kay's friends, until Kay herself is in the crosshairs of the murder investigation.

Amelia Ashley shares everything with her followers—her favorite hole-in-the-wall restaurants, her best fashion tips, and her European trip of a lifetime with her hot boyfriend. Josh has no choice but to return home without Amelia after she abandons him in Rome. He has no clue where she went or how her blood got in his suitcase. Why won't anyone believe him? To Harper Delgado, Amelia Ashley is just another missing white girl whipping up a media frenzy. But with each digital knot she untangles about the influencer, Harper wonders: who is Amelia Ashley?

After being jilted by her ex-boyfriend and best friend, Jade couldn't be more ready to embark on the adventure of a lifetime—11 countries in 4 months, all from the luxurious Campus on Board ship—and to wedge an entire globe between her and the people who broke her heart. But when Jade discovers the backstabbing couple are also setting sail, her obsession with them grows and festers, leading to a shocking murder.

Sadie hasn't had an easy life. Growing up on her own, she's been raising her sister, Mattie, in an isolated small town, trying her best to provide a normal life and keep their heads above water. But when Mattie is found dead, Sadie's entire world crumbles. After a somewhat botched police investigation, Sadie is determined to bring her sister's killer to justice and hits the road following a few meager clues to find him. When West McCray - a radio personality working on a segment about forgotten towns in America - overhears Sadie's story, he becomes obsessed with finding the girl.