Nadine Walsh’s summer garden party is in full swing. The neighbors all have cocktails, the catered food is exquisite—everything’s going according to plan. But Nadine—devoted wife, loving mother, and doting daughter—finds herself standing over a dead body in her basement while her guests clink glasses upstairs. What happened? How did it come to this?

Annabel, Esther, Tanya, and Chloe are best friends—or were, as children. Despite drifting apart in adulthood, shared secrets have kept them bonded for better or worse, even as their childhood dreams haven’t quite turned out as they’d hoped. Then one day they receive a wholly unexpected—but not entirely unwelcome—invitation from another old friend. Poppy Greer has invited them all to her extravagant bachelorette party: a first-class plane ticket to three days of white sand, cocktails, and relaxation on a luxe private island in the Bahamas.

Vivvy Bouchet, daughter of a known psychic, was ten when she saved a boy’s life by making an impossible prediction. Now she’s an astrophysicist in Texas, devoted to science, but the boy she saved has become a cop who continues to believe she can see things no one else can. When he begs for help on the high-profile cold case of a kidnapped girl, Vivvy steps back into the ocean of voices that once nearly drowned her.

Jane is unhappy. A struggling midlist writer whose novels barely command four figures, she feels trapped in an underwhelming marriage, just scraping by to pay a crippling Bay Area mortgage for a house—a life—she's never really wanted. There's only ever been one person she cared about, one person who truly understood her: Thalia. Jane's best and only friend nearly a decade ago during their Creative Writing days at Oxford.

The residents of the exclusive cul-de-sac on Alton Road are entangled in a web of secrets and scandal utterly unknown to the outside world, and even to each other. On the night of the annual summer block party, there has been a murder. But, who did it, and why, takes listeners back one year earlier, as rivalries and betrayals unfold. The real danger lies within their own block and nothing—and no one—is ever as it seems.