Old houses in Zagreb are destroyed in order to build new, bigger blocks. A teacher who lives in one of these houses allows a stranger to share his home with him. The stranger has a fascination with statistics, and claims he can predict crimes based on statistical analyses. When a predicted murder did not occur, the stranger is adamant that the whole town will suffer unless a balance is achieved - and he leaves.
A young couple have settled in a new flat. Soon somebody begins watching them and they receive great amounts of money from an unknown sender.
Filip lives in the small town of Samobor, which is near Zagreb. He works in the local library as a librarian. Even though he moved to the small town many years ago, he still misses the bustle of life in Zagreb. However, his boring routine is interrupted by the arrival of a new library manager, the pretty Elza. Soon, however, a series of strange deaths happen.
