Noah Solloway has escaped the city with his wife and children. At the same time, Montauk local Alison Lockhart struggles with her husband to move past a recent tragedy. In a chance encounter the two meet and connect.

With his novel gaining traction, Noah turns to Alison to help him research the local culture. Meanwhile, Cole takes a stand on behalf of his community, and Helen deals with business back in Brooklyn.

In order to spend time together apart from their families, Noah and Alison take a day trip to remote Block Island. But as the two grow closer, they quickly learn that intimacy can be a double-edged sword.

Alison and Noah are forced to confront new obstacles at home. Alison gets a surprise visit from her estranged mother, Athena, while Noah struggles with the behavior of his daughter, Whitney.

Noah spends a night out with his best friend Max and discovers there's more to Alison than he's been led to believe. Meanwhile, Alison and her husband Cole work to keep the Lockharts from danger.

With summer coming to an end, the Solloways are returning to Brooklyn. Cole is forced to confront Alison when the Lockhart side business hits too close to home. And Helen and Noah grapple with an unexpected emergency.

Distracted by her burgeoning small business, Helen tasks Noah with representing the family at a literary award ceremony for her father, Bruce. A chance encounter with Alison and her grandmother leads to an uncomfortable truth.

A revelation about their daughter Whitney makes Noah and Helen realize their troubled marriage is directly affecting their children. Bending under remorse, Alison spirals towards a reckoning.