This three-part crime film has solved the mystery of the death of the Bulgarian doctor Manolov, who died in a car accident in the Scandinavian country. Investigator Debarsky understands that this is a murder. Manolov worked in an international team on protection to improve the body's immune system. The former Nazi, who now works for the special services, wanted to steal the discovery of Manolov.—Georgi Djulgerov