Alison Weston's dreamy life falls apart when her new husband, Sean, disappears during a morning surf; police presume that he drowned, but Alison isn't sure what to believe; her instincts are right - something very sinister has happened.

Alison learns that Ethan argued with Sean on the morning of his disappearance; as police launch an investigation, Ethan, Michael and Logan all appear to be persons of interest; Sean's true killer is someone even closer to home.

Still wrestling with her grief, Alison begins to confront the reality of a life without Sean; blind to Dan's manipulations, Alison continues to place her trust in him; Dan goes to drastic efforts to frame Michael.

The image of Michael murdering Sean haunts Alison, and Dan comforts her through the pain he orchestrated; Hannah searches for proof her missing father is innocent, and Dan makes his move to win Alison.