The first day at work is always full of excitement. Ambitious investigator Olga Gradova starts a new case. And it must happen that the victim is her acquaintance. The girl’s colleagues believe that the guy committed suicide under the influence of drugs. But she is sure: this is about murder. Plunging headlong into the investigation, Olga goes on the trail of the bandits. But there are more questions than answers. There are several suspects, and each has a motive. Some want to profit from the drug trade, others want to take revenge for the long-ago murder of a crime boss. Which criminal is guilty this time? Where is the end of the thread leading to the very bottom of the criminal world? Olga will try to find out, putting her own career and life at risk.