Sloane Parker is dreading her birthday. She doesn’t need a reminder she’s getting older, or that she’s feeling indifferent about her own life. Her husband surprises her with a birthday-weekend getaway --- not with him, but with Sloane’s longtime best friend, troublemaker extraordinaire Naomi. Sloane anticipates a weekend of wine tastings, cozy robes and strategic avoidance of issues she’d rather not confront, like her husband’s repeated infidelity. But when they arrive at their rental cottage, it becomes clear that Naomi has something else in mind. She wants Sloane to stop letting things happen to her, for Sloane to really live. So Naomi orchestrates a wild night out with a group of mysterious strangers, only for it to take a horrifying turn that changes Sloane’s and Naomi’s lives literally forever.

Vesper Wright left home at 18 and never looked back --- mostly because she was told that leaving the staunchly religious community she grew up in meant she couldn’t return. But then an envelope arrives on her doorstep. Inside is an invitation to the wedding of Vesper’s beloved cousin, Rosie. It’s to be hosted at the family farm. Have they made an exception to the rule? It wouldn’t be the first time Vesper has been given special treatment. Something inside her insists she go to the wedding. Even if it means returning to the toxic environment she escaped. Even if it means reuniting with her mother, Constance, a former horror film star and forever ice queen. When Vesper’s homecoming exhumes a terrifying secret, she’s forced to reckon with her family’s beliefs and her own crisis of faith.

Rory Morris isn’t thrilled to be moving back to her hometown, even if it's temporary. There are bad memories there. But her twin sister, Scarlett, is pregnant and needs support, so Rory returns to the place she thought she’d put in her rearview. After a night out at a bar where she runs into Ian, an old almost-flame, she hits a large animal with her car. And when she gets out to investigate, she’s attacked. Rory survives, but life begins to look and feel different. She’s unnaturally strong, with an aversion to silver --- and suddenly the moon has her in its thrall. She’s changing into someone else --- something else, maybe even a monster. But does that mean she’s putting those close to her in danger? Or is embracing the wildness inside of her the key to acceptance?

After being unceremoniously dumped by her longtime boyfriend, Annie seeks a fresh start. She accepts a teaching position that moves her from Manhattan to a small village upstate. There she meets Sophie, who wants to be her friend. Sophie also wants her to stop apologizing and start living for herself. That’s how Sophie lives. Annie can’t help but gravitate toward the self-possessed Sophie, wanting to spend more and more time with her, despite the fact that the rest of the townsfolk seem a little afraid of her. Sophie’s appearance is uncanny and ageless, her mansion in the middle of the woods feels a little unearthly, and she does seem to wield a certain power. But she couldn’t be. Could she?

Julie is missing, and no one believes she will ever return --- except Elise. Elise knows Julie better than anyone, and feels it in her bones that her best friend is out there and that one day Julie will come back. She’s right. Two years to the day that Julie went missing, she reappears with no memory of where she’s been or what happened to her. Along with Molly and Mae, their two close friends from college, the women decide to reunite at a remote inn. But the second Elise sees Julie, she knows something is wrong --- she’s emaciated, with sallow skin and odd appetites. And as the weekend unfurls, it becomes impossible to deny that the Julie who vanished two years ago is not the same Julie who came back. But then who --- or what --- is she?