Still reeling from the chaos of their wedding, Evelyn and Richard arrive on a tiny Greek island for their honeymoon. It's the end of the season and a storm is imminent. Determined to make the best of it, they check into the sun-soaked doors of the Villa Rosa. Evelyn is wary of the hotel's owner, Isabella, who seems to only have eyes for Richard. Isabella is preoccupied with her chance to enthrall hotel guests with the story of "the sleepwalkers," a couple who had stayed at the hotel recently and drowned. The night of the storm, Evelyn and Richard are separated and forced to face dark truths, but it's their confessions around the origins of their relationship and the years leading up to their marriage that might save them.