Ann and John Hayward's honeymoon at Collinwood slowly turns into a series of nightmares.

Soon after their arrival, John, who is recovering from a war injury, falls victim to strange, violent spells. In a fit of irrational jealousy, he accuses his wife of falling in love with Barnabas Collins.

Meanwhile, a series of attacks on her life frighten Ann into believing John is trying to kill her. Though tormented by doubts of John's sanity, she believes his warning that Barnabas is a vampire. Ann nevertheless accepts help from Barnabas-- and unknowingly becomes the prey to the evil forces at Collinwood