When the Frank family throws their annual clambake at their gorgeous beachside home on Cape May, the seafood is always delivered to white-clothed tables on fine bone china. And Peter Frank, the beloved son and perennial heartbreaker, will make the rounds, charming every woman on the guest list.

Top of that list this year are Maya, his tennis star girlfriend just coming off the high of winning Wimbledon; Catherine, his high school sweetheart turned wildly successful wedding planner and influencer; and Leanne, the fiercely protective aunt and legal guardian of his only son. When Maya, Catherine, and Leanne arrive expecting an extravagant feast, they're instead lured into a room together by a mysterious text to find Peter and...Tilly.

Tilly, all golden blonde hair and perfectly tan skin, explains to the three women 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. Now they'll have to work together to figure out who really did kill Tilly, and fast--because maintaining a good reputation in this crowd can be murder.