The little town of Petrovice has been terrorized by a serial killer who is murdering the students of the local school. The police are searching for the killer, but cannot find any lead. There is every indication that the masked murderer has been gunning for Karin Tomecková whose parents were brutally killed 8 months ago. The murders are piling up and so are the suspects. The police are trying hard to catch the murderer, but it might be even late. The killer can be anywhere.