Honeymoon's Tagline: After the ceremony comes the ritual.

Young newlyweds Paul (Harry Treadaway - Penny Dreadful) and Bea (Rose Leslie - Game of Thrones) travel to remote lake country for their honeymoon, where the promise of private romance awaits them. Shortly after arriving, Paul finds Bea wandering and disoriented in the middle of the night. As she becomes more distant and her behavior increasingly peculiar, Paul begins to suspect something more sinister than sleepwalking took place in the woods.