Paul (Harry Treadaway) and Bea (Rose Leslie) are a pair of young couples who are immersed in the happiness of their newlyweds. After the wedding ceremony, they drove to the country jungle and spent their honeymoon in the cabin in the woods where Bea lived in her childhood. At first, everything went well, and the world of the two was dreamy and romantic. However, since meeting Bea's childhood friend Will (Ben Huber), some strange feelings have quietly grown in the hearts of the couple. Taking this as an opportunity, the atmosphere of strange panic spread. One night, Bea suddenly sleepwalked to the wild, leaving traces of bites on her body, and her emotions became extremely unstable in the days that followed. Jealousy and suspicion rose in Paul's heart, but he didn't know that a supernatural force was destroying his beautiful and fragile love with Bea...