On a brisk fall night in a New York apartment, 35-year-old Billie West hears terrified screams. It's her lifelong best friend Cassie Barnwell, one floor above, and she's just realized her infant daughter has gone missing. Billie is shaken as she looks down into her own arms to see the baby, remembering --- with a jolt of fear --- that she is responsible for the kidnapping that has instantly shattered Cassie’s world. Once fiercely bonded by their secrets, Cassie and Billie have drifted apart in adulthood. Cassie is married to a wealthy man, has recently become a mother, and is building a following as a lifestyle influencer. She is desperate to leave her past behind --- including Billie, who no longer fits into her world. But Billie knows the worst thing Cassie has ever done, and she will do whatever it takes to restore their friendship.

It is 2013, and 23-year-old Brooklyn barista Molly Diamond has just locked eyes with Jake Danner, the front man of an up-and-coming Southern rock band. It’s not long before Molly and Jake fall deeply in love, inspiring each other’s writing and planning for a life together filled with creativity, passion and adventure. But nearly a decade later, Molly is teaching yoga and living in a posh Connecticut suburb with her young daughter and husband, Hunter --- who is decidedly not Jake Danner. Molly is lonely in picture-perfect Flynn Cove --- until Sabrina walks into her studio. A newcomer in town, Sabrina has her own reasons for seeking out Molly, and their blossoming friendship will set both women on a collision course of deep-rooted secrets, lies and manipulation.

Skye Starling is overjoyed when her boyfriend, Burke Michaels, proposes after a whirlwind courtship. Though Skye seems to have the world at her fingertips, she’s also battled crippling OCD, and her romantic relationships have suffered as a result. But now Burke says he wants her. Forever. But Burke isn’t who he claims to be. And interspersed letters to his therapist reveal the truth: he’s happily married and using Skye for his own, deceptive ends. In a third perspective, set 30 years earlier, a scrappy 17-year-old named Heather is determined to end things with Burke, a local bad boy, and make a better life for herself in New York City. But can her adolescent love stay firmly in her past --- or will he find his way into her future?

Lucy Albright is far from her Long Island upbringing when she arrives on the campus of her small California college, and happy to be hundreds of miles from her mother, whom she has never forgiven for an act of betrayal in her early teen years. Quickly grasping at her fresh start, Lucy embraces college life and all it has to offer. And then she meets Stephen DeMarco, who sees something in Lucy that no one else has. Meanwhile, Stephen is determined to forget an incident buried in his past that, if exposed, could ruin him. Lucy knows there’s something about Stephen that isn’t to be trusted. Stephen knows Lucy can’t tear herself away. And their addicting entanglement will have consequences they never could have imagined.