Helen makes an innocent mistake that leads to outrageous consequences. Meanwhile, a court order leads to a dire setback for Noah and Alison.

One year earlier: after a stern request from Noah leaves Helen devastated, various pressures cause Helen and Vik to reexamine their relationship. Alison returns to Montauk after a crisis only to have her worst fears realized.

Cole is put in an increasingly impossible situation by Alison's return to his life. Alison must contend with Luisa while attempting to reconnect with her daughter. Simultaneously, a dangerous passion threatens to wreck everything.

An unexpected cause to celebrate provokes a sobering realization in Alison. Soon after, a startling warning leaves her pondering the unthinkable. Cole's frustrations with Alison come to a head, revealing a radical truth.

Helen's escape to Montauk exacerbates her guilt and hastens an identity crisis: should the truth finally come out? Noah's world collapses, leaving him to process something horrific.