Who would have imagined that the celebration of the anniversary of Semyon Vedersky, a successful and respected man, would end before it even began... with his own murder! The guests, instead of honoring the hero of the day, had to act as witnesses and suspects... Larisa Kotova, the owner of the Chaika restaurant, where the celebration was supposed to take place, undertakes to conduct an investigation. Why she? Yes, because this new Russian has such an amazing hobby, and she already has dozens of successfully solved cases. But now she faces a very difficult task - after all, everyone has an alibi...