How was the secret hospital created, where Soviet medicine merged with demonology? In 1976, psychoneurologist Yana arrives at a research institute, behind whose walls something unscientific is taking place. Leonid Brezhnev himself must be saved: the General Secretary has survived a dangerous encounter with supernatural forces whose existence the Party denies altogether. After this, carefully selected doctors, officials, and paranormal entities join forces to create a clinic for those possessed by demons. Yana becomes its first chief physician. Surrounded by an extraordinary team, she deals with various cases of possession, becoming convinced of one thing: everyone has their own demons.