Men may come and go, but on the North Shore of Long Island, best friends are forever. Susan’s ex-con husband offends the girls a Plastic Surgery Fashion Show thrown by Gail and her husband, Dr. Greenberg. Meanwhile, Amy’s volatile relationship explodes in public and Liza confronts the biggest change in her life since her scandalous divorce.

While the friends head to the Hamptons to beat the heat, Amy stays behind to fix her broken relationship with her fiancé, Arthur; the pressure of running her health and wellness spa takes a toll on Cori's marriage.

The women bid farewell to Gurney's Montauk Resort, but not before Susan and Liza settle a score in the sand; Cori's spa teeters on the brink of disaster; Liza confronts her fears as her old life is ripped away.

Liza is on the hunt for a man while Amy struggles to fix the one she's got; when Cori and her husband host a dinner party, Susan's ex-con husband brings a major revelation to the table.

Emotions run high on Fire Island, N.Y.; Susan's husband brings Cori to tears; the group tackles Amy's love life during an intervention; the women take part in a "walk off" at a drag show; Susan makes excuses for her husband's bad behavior.

Amy threatens to throw her son out on the street; Cori fears she's caught Sandy cheating and turns to Gail for advice; Liza confronts her ex-fiancé about re-gifting an engagement ring; Susan invites her friends to her son's birthday party.