Welcome to North Falls—a small town where everyone knows everyone. Or so they think. Until the night of the fireworks. When two teenage girls vanish, and the town ignites. For Officer Emmy Clifton, it’s personal. She turned away when her best friend's daughter needed help—and now she must bring her home.

In seven days Jet Mason will be dead. Jet is the daughter of one of the wealthiest families in Woodstock, Vermont. Twenty-seven years old, she’s still waiting for her life to begin. I’ll do it later, she always says. She has time. Until Halloween night, when Jet is violently attacked by an unseen intruder. She suffers a catastrophic head injury. The doctor is certain that within a week, the injury will trigger a deadly aneurysm.

The Labasques aren’t like other families. Living in a shack out in the swamps, they made do by hunting down alligators and other animals. To the good people of Jacknife, Louisiana, they are troublemakers and outcasts, the kind of people you wouldn’t want in your community. So, when Cutter Labasque is found face down in the muddy swamp, no one seems to care, not even her two brothers. The only person who questions the official verdict of suicide is Cutter’s childhood friend, Loyal May, who has just returned home to care for her mother.

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.

Meet Frost, Morgan, and Belle—a wealthy, gorgeous group of New York City moms, the queen bees of downtown Manhattan. Their children attend Atherton Academy, the top private school in the city, and their social lives revolve around elaborate themed parties. On the first day of school, the arrival of a new mom and mysterious beauty from Miami, Sofia shakes up their world. When Sofia quickly integrates herself into their clique, inexplicably bad things start to happen to the women. Is someone at school out to get them?