The fifth season and final season will take place in two different time frames: a present-day storyline including Noah, Helen, and their four children and the other decades later featuring a now-adult Joanie Lockhart returning to Montauk to find out the truth about her mother's death.

Noah has moved to Los Angeles to be closer to his younger children Trevor and Stacey, as Helen and Vik have moved there. Cole and Luisa are living together in Montauk, while Alison is working as a grief counselor.

It's 3 years later, and Noah, Alison, Cole, Helen and their families are trying to move on with their lives. But the past keeps coming back to haunt them, and the trauma of what they've been through cannot soon be forgotten.