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?

Every year, executives at the trendy tech startup Aurora gather the company’s top employees for an exclusive retreat in Miami, and this year Caitlin Levy --- Aurora’s newest hire --- is joining the team as head of events. The benefits are outstanding: a seven-figure salary, stock shares, a discretionary bonus, limitless vacation days. What could possibly go wrong? When a fellow high-level executive vanishes after the first night, the disappearance has the potential to derail the future of the company’s sale and cost everyone on the team millions. Now more than ever, Caitlin and her colleagues must continue the charade --- partaking in team-building exercises, group brainstorms, dinners --- in order to keep the future of Aurora afloat amid all the fatal speculations.

None of them would claim to be a particularly good person. But who among them is actually capable of murder? Jen Weinstein and Lauren Parker rule the town of Salcombe, Fire Island, every summer. They hold sway on the beach and the tennis court, and are adept at manipulating people to get what they want. Their husbands, Sam and Jason, have summered together on the island since childhood, despite lifelong grudges and numerous secrets. Their one single friend, Rachel Woolf, is looking to meet her match, whether he’s the tennis pro --- or someone else’s husband. But even with plenty to gossip about, this season starts out as quietly as any other. Until a body is discovered, face down, off the side of the boardwalk.