The series follows Tomáš, a demon hunter working for a secret order. He does order's will and believes that he is on the right side, although he has doubts about some of the habits and methods of his organization. During his work he helps police to investigate mysterious cases associated with mysterious and inexplicable phenomena and fights demons as he tries to maintain the balance between good and evil.

Alice is a manager at insurance company. She starts having dreams when a murder occurs at Tribeč Mountains and doesn't know if her dreams are just dreams or visions. The murder is similar to murder of her mother that happened thirty years ago and her father was convicted for it. For years she blamed him for what he supposedly did. However, her father denies the guilt and cannot explain what happened in front of his eyes at that time. At the crime scene she unexpectedly meets Tomáš and soon afterwards she gets in contact with a demon who enters inside her but she doesn't become possessed by him which never happened before. Tomáš believes that this is a new chance and that Alice can become a new weapon in an unequal battle. Therefore, he decides to protect her even from the very organisation of which he is a member and invites her to join him in his work.