Inga Khvostikova, the best employee of the Chao-Kakao breakup agency, becomes a witness to a stormy scandal, in the midst of which a man convicted of treason falls dead. What happened looks like a banal accident - death from a heart attack. And only Inga doubts the hasty conclusions of the investigation. She is almost sure that her presence at the scene of the murder was not an accident at all, but part of a criminal plan.