Cora's on the island vacation of her dreams: a private beach in paradise, a romantic proposal, and an eight-figure cheque following the sale of her new fiancé’s business. When their island turns out to be not so private after all, Cora tries to make the best of a bad situation by inviting their strangely friendly neighbours to celebrate with them. But it doesn't take long for her once-in-a-lifetime holiday to take a very sinister turn...