A girl named Anya and her boyfriend Yurko come to visit Anya's parents in a small mountain village, where they encounter a young witch Ivanka, whom the people call Morena. Ivanka liked Yurko, and at night on Ivana Kupala, during the celebration, the witch makes Anya to associate herself with her with mystical ties for the sake of Yurko's life. The next morning Anya notices that her boyfriend acts absolutely differently. One night Anya finds Yurko in the witch's embraces. When she returns home in tears, Anya is being supported by her girlfriends. Unofficial war with Morena (Ivanka) begins. During one of the clashes, Ivanka tries to kill Anya, but she falls from the bridge and dies. From that day, horrors and mysticism begin. Ivanka's father gets crazy because of a grief and wants a revenge for the death of his daughter. At first, one friend of Anya disappears, she eventually finds her with a torn throat in the abandoned cemetery, and then the killings of other girlfriends help her in confrontation with Morena. Anya is confident that this is the case of Ivanka's father, but the truth is even more terrible. Yurko witnesses the brutal murder and the murderer is his beloved Anya, who bare hands to loosen up two adult armed cops who watched her after the death of Ivanka. In the morning, Anya does not remember anything done. It turns out that the soul of witch Ivanka controls the body of Anya at night . Yurko and Anya have to cut off this connection, destroying the soul and body of the witch. Will they be able to do this if everyone is against them?