Private detectives also have toothaches. This simple truth was revealed to the great detective Tatyana Ivanova at her friend’s birthday. One of the guests, a certain Olkhovsky, turns out to be a dentist. He promises Tanya help, but... asks her to immediately find a suitcase with seven kilograms of gold, missing from the safe of the head physician of their clinic. But even before she visited this charitable establishment and began to look for the trace of the mysterious suitcase, Olkhovsky was killed. “The matter is really serious,” Tanya decides and begins the investigation by interviewing the clinic staff. One of them shows her... a suitcase with gold. So did the suitcase ever disappear? And how many of these suitcases do they have? Bandits immediately flock to the shine of gold. And Tatyana... turns out to be the police's main suspect in this case...