Dr. Theo Kray explores nature using mathematical models. His passion and at the same time unique skill is to find patterns and system in the seemingly chaotic behavior of animals. When the police discover the body of a girl who, by all indications, was killed by a bear, only Doctor Krey has doubts. A preliminary investigation shows that similar murders have already occurred before. Theo is sure something strange is going on. Now the professor, who has neither the skills of a detective nor the credentials of a police officer, must first find information about all the victims, and then convince the authorities that he is right. Starting his own investigation, Theo does not suspect that he will have to change a lot in the process in order to complete the job. But the worst thing awaits at the end - after all, a successful search means meeting the predator face to face.