The document discusses several themes that could be addressed in a thriller opening, including paranoia, possessed children, stalking, child separation, adoption, and demonic possession. It provides definitions and descriptions of each theme. Paranoia involves irrational fears and suspicions of harm. Adoption disrupts family relationships and causes feelings of loss. Stalking places victims in danger through unwanted pursuit and harassment. Separating siblings in foster care or adoption adds emotional trauma. Demonic possession is described in some cultures as control by malevolent spirits, though it is not a recognized medical diagnosis.