Maddy Wight is hired to ghostwrite the memoir of world-renowned cosmetic surgeon Dr. Angela Reynolds. She travels to Angela’s remote estate in the Scottish Highlands to hunker down and learn everything she can. Sharing the estate is Angela’s enigmatic business partner, Scott, whose mercurial moods change as quickly as the conditions on the darkening moors outside --- and Maddy finds herself drawn ever closer to him. Returning to London once the book is finished, Maddy is excited for their future together. But her dreams are shattered at the book launch when Angela learns that Scott has leapt to his death from the Scottish cliffs. Which is why Maddy is completely blindsided months later when she sees Scott entering the Tube station just in front of her. It can’t be him, can it?

When a Navy vessel comes across a yacht in distress in the middle of the vast Indian Ocean, Captain Danial Tengku orders his ship to rush to its aid. On board the yacht is a British couple: a horribly injured man, Jake, and his traumatized wife, Virginie, who breathlessly confesses, “It’s all my fault. I killed them.” Trembling with fear, she reveals their shocking story to Danial, and it will be up to him to determine just how truthful she is. But when his crew makes a shocking discovery, Danial realizes that if he doesn’t act soon, they could all fall under the dark spell of the island.