Eden Fox, an artist on the brink of her big break, sets off for a run before her first exhibition. When she returns to the home she recently moved into, Spyglass, an enchanting old house in Hope Falls, nothing is as it should be. Her key doesn’t fit. A woman, eerily similar to her, answers the door. And her husband insists that the stranger is his wife.

Halley James knows her marriage is over. But she’s not prepared for the rest of her life to fall apart too. She just lost her job at the forensics lab. Her dad needs emergency surgery. But the biggest blow comes back home in Marchburg, Virginia, where she discovers her mother didn’t actually die in a car crash. Her mom was murdered—and her father lied about it all these years.

Eager to celebrate her nuptials with her nearest and dearest, Odelia invites her adult children, her daughter-in-law, her grandchild, and her best friend/assistant to an all-expenses-paid luxury safari at Leopard Sands in South Africa, the Babel family’s favorite vacation spot. In its soil, they have deep roots—and even deeper secrets.

The people in Frankie Morgan’s life say she’s angry. Emotionally stunted. Combative. But really, who can blame her? It’s hard being nice when your clients are insufferable, your next-door neighbor is a miserable woman and the cowardly driver who killed your mother is still out living it up somewhere. Somehow, though, she finds herself at her very first anger-management group session—drinking terrible coffee and learning all about how “forgiveness is a process.” One that starts with a list.

Six friends reunite in London to celebrate the life of their recently deceased ex-employer, a professor that brought them together in 1999 to help build a dating website based on psychological testing. But what is meant to be a night of bittersweet nostalgia soon becomes a twisted and deadly game. The old friends are given an ultimatum: reveal their darkest secrets to the group or pick each other off one-by-one. It soon becomes clear that their current predicament is related to their shared past.