A beautiful young woman, Emily Thorne, who was known as Amanda Clarke, rents the Southampton home she once shared with her father and sets her plan in motion.

Emily gets to work on her next target, a former family friend who testified against her father; Victoria tries to find more information on Emily.

Daniel's imprisonment sends Victoria to depths that no one thought possible, as the surprise return of a past love provides a destructive but welcome distraction from her family's struggles. Meanwhile, Jack's search for Amanda grows more desperate as he comes under suspicion for murder.

With the end in sight, Emily fearlessly pushes forward, closing in on the final phases of her plan for revenge, while the Graysons continue their downward spiral into the rabbit hole of self-destruction. But a big, explosive event leaves much hanging in the balance, courses are altered and even more is left in question.

In the wake of last summer's events in the Hamptons and with the ante even higher, what will Emily's next move be? Will she be able to manage her heart and keep her emotions from getting in the way of her resolve to avenge her father?

The devastation leads to a heartbreaking death that will send shockwaves down the shoreline and force Emily to take a hard look at the truth and the path of revenge she has embarked on.