For years, three couples have gathered at The Villa --- billionaire Lincoln Foster’s Hamptons estate --- for lavish weekends among friends. But this year, mysterious blue cards appear in each bedroom, exposing secrets: their host’s betrayals and the guests’ own dark deeds. Everyone has something to hide. Even uninvited guests hoping to be accepted among the elite. With a hurricane bearing down, no one is getting out. When the revelations turn deadly, the trapped friends must confront what their lies have cost them --- possibly their lives.

At the Frank family’s annual clambake, Peter Frank plans to charm every woman on the guest list. They include Maya, his tennis star girlfriend; Catherine, his high school sweetheart turned wedding planner and influencer; and Leanne, the fiercely protective aunt and legal guardian of his only son. When Maya, Catherine and Leanne arrive, they’re lured into a room together by a mysterious text to find Peter and...Tilly. Tilly explains that she and Peter plan to get married that night, that Maya and Peter are through, that Peter will no longer be investing in Catherine’s company, and that Leanne must give up guardianship of her nephew. The enraged women attend the impromptu wedding, but when a chandelier falls and crushes the bride, suddenly they’re three likely suspects with three perfect motives. 

Paige Lancaster has returned to the East Coast from her prestigious, well-paid job in Los Angeles, writing for the smartest detective series on television. Something terrible happened to her, leaving her broke, homeless, and living with her widowed mother and eight-year-old daughter, Izzy. Paige meets the movers and shakers of Izzy’s school’s Parent Booster Association, run by the intimidatingly gorgeous Ainsley Anderson, who just happens to be married to Paige’s old high school flame, John. Then she shows up at the annual Parents and Pinot fundraiser, held at Ainsley and John’s dazzling mansion, where she’s caught in a compromising position with John. Later that night, Ainsley turns up dead at the bottom of her own driveway. Did she fall? Or was she pushed?

Emma Walsh has finally worked up the courage to confront her husband, James, about his drinking. But he never shows up to meet her as planned. His body lies crumpled amidst the wreckage of his flashy car, which has been smashed to its final resting place halfway through the back wall of their suburban house’s garage. In the aftermath of the fatal crash, Emma and her teenage children begin to embrace life without James’ looming, volcanic presence. It turns out that her husband’s legacy as an upstanding business owner and family man shines only because so many people, for so long, were so willing to keep his secrets --- secrets that twist into new and unexpected shapes as the mysterious details of his last day of life begin to come to light.