To anyone on their flight out of New York, they appear to be five best friends excited for a destination wedding in Miami. No one would guess that each of them has a reason to want the groom dead. Trevor Vaughn, the groom in question, wooed his bride-to-be by first becoming close with her friends—which is to say that he learned all of the five’s darkest, most dangerous secrets and blackmailed them into convincing Fiona to say “I do”. The friends were forced to convince a doubting Fiona to go through with the wedding, no matter what, and now the charade is set to continue.

When Jace Montgomery comes home late from entertaining clients, he discovers that his wife, Tessa, is missing. There’s broken glass at the back door. Clumps of her hair. Blood. The cops in their small New Jersey town have him pegged as a suspect, especially after he explodes at a reporter during a press conference. Jace maintains his innocence despite the mounting evidence against him, but when a coworker he’s accused of having an affair with also disappears and a search warrant turns up an illegal gun in Jace’s home, all signs point to him as the culprit.

Saffy is waiting to go into an important meeting when she receives a missed call and then a text message from her best friend, Leona: Please help...come now. Of course, she races to her friend’s house. But when she arrives, she notices something strange. This message was deleted. Leona answers the door, and insists everything's fine. She doesn't know anything about the message. Six hours later, Saffy gets a knock on the door. It's the police. They’ve found a body. And Saffy was the last one to see them alive.

When private investigator Matthew Hill picks up the call from his wife, Sally, his world comes crashing down. Their eight-year-old daughter, Amelie, is missing. One second, she was there, the next, she was gone. It’s the very nightmare they’ve been dreading. Long ago, Matthew left the force after a woman blamed him for her son’s death, promising that he too would one day feel her pain. It’s a threat that’s hung over his family ever since, and now it’s Amelie’s picture on the news.

It was supposed to be the happiest time of their lives. But for newlywed Stella, the dream honeymoon has turned into a nightmare overnight. Her perfect husband, Austin, has vanished without a trace. Alone in Venice, Stella frantically searches for him. But as fear turns into confusion, she finds herself questioning everything she knows about the man she married. Has Austin really abandoned her, or has someone from his past finally caught up with him—the business partner he threatened to sue? The obsessive ex-girlfriend who refuses to let go?