A windswept private island off the coast of Massachusetts. A hungry ocean, churning with secrets and sorrow. A fiery, addicted heiress. An irresistible, unpredictable boy. A summer of unforgivable betrayal and terrible mistakes. Welcome back to the Sinclair family. They were always liars.

Pay close attention, and you might solve this. On Monday afternoon five students at Bayview High walk into detention. Bronwyn, the brain, is Yale-bound and never breaks a rule. Addy, the beauty, is the picture-perfect homecoming princess. Nate, the criminal, is already on probation for dealing. Cooper, the athlete, is the all-star baseball pitcher. And Simon, the outcast, is the creator of Bayview High's notorious gossip app. Only Simon never makes it out of that classroom. Before the end of detention, Simon's dead.

Abby wants a baby more than anything. But after years of failed infertility treatments and adoptions that have fallen through, it seems like motherhood is not in her future. That is, until her personal assistant Monica makes a generous offer that will make all of Abby's dreams come true. But it turns out Monica isn't who she says she is. The woman now carrying Abby's child has an unspeakable secret. And she will stop at nothing to get what she wants.

Pip is not in the mood for her friend’s murder mystery party. Especially one that involves 1920’s fancy dress and pretending that their town is an island called Joy. But when the game begins, Pip finds herself drawn into the make-believe world of intrigue, deception and murder. But as Pip plays detective, teasing out the identity of the killer clue-by-clue, the murder of the fictional Reginald Remy isn’t the only case on her mind …

Milly, Aubrey, and Jonah Story are cousins, but they barely know each another, and they've never even met their grandmother. Rich and reclusive, she disinherited their parents before they were born. So when they each receive a letter inviting them to work at her island resort for the summer, they're surprised...and curious.