Elise Watters seems to have it all --- a blissful marriage, a gorgeous Victorian home surrounded by lush gardens, and a dream job running her late mother’s herbal boutique. But on the eve of her first wedding anniversary, Elise makes a shocking discovery that turns her life upside down and casts doubt on everything she thought she knew --- about her marriage, her friends and even herself. As she treads into dangerous territory, Elise is forced to wonder: Is her whole future at stake? Or is paranoia getting the best of her? If she is to believe what she sees, Elise has every reason to fear for her life.

Imagine your closest friend utterly betraying you. Years later, when she seeks forgiveness, you invite her to your engagement party as a gesture of reconciliation. But seething hostilities rise to the surface, ruining everyone’s evening. After an awful night, your friend’s battered, lifeless body is found at the bottom of a rocky cliff. Newly engaged Marissa Parlette is living this nightmare. Desperate for answers, Marissa digs deep into the events of the party. But what she remembers happening after nightfall now carries sinister implications. The more she investigates, the more she questions everything she thought she knew about her friends, the man she once trusted, and even herself.

Thirty-four-year-old marine biologist Kyra Winthrop remembers nothing about the diving accident that left her with a complex form of memory loss. With only brief flashes of the last few years of her life, her world has narrowed to a few close friendships on the island where she lives with her devoted husband, Jacob. But all is not what it seems. Kyra begins to have visions --- or are they memories? --- of a rocky marriage, broken promises and cryptic relationships with the island residents, whom she believes to be her friends. As Kyra races to uncover her past, the truth becomes a terrifying nightmare.