Madeline remembers everything and forgives no one. Her ex-husband and his yogi wife have moved into her beachside community, and their daughter is in the same kindergarten class as Madeline's youngest. Now that Celeste's twin boys are starting school, she and her husband look set to become the king and queen of the parent body. But royalty comes at a price, and Celeste is grappling with how much she is willing to pay. Young single mom Jane is sad beyond her years and harbors secret doubts about her son. While Madeline and Celeste soon take Jane under their wing, none of them realizes how the arrival of Jane and her inscrutable little boy will affect them all.