On the eve of Christmas, six strangers receive letters with strange content. In addition to letters, the envelopes contain white powder. The anti-terrorist department is unsuccessfully looking for connections between these people, who, meanwhile, begin to die one after another. Colonel Levitsky, leading the investigation, cannot make a choice between his wife and his mistress Anyuta. In addition, Anyuta makes the colonel nervous by showing excessive interest in his official affairs. Levitsky knows that this interest is by no means safe, but Anyuta really wants to find the sender of the mysterious messages!..