A modest mathematics teacher Katya Golitsina receives an unexpected offer: to write a book for the famous TV presenter Alina Alova. The TV personality has a lot of dirt on her colleagues and high-ranking acquaintances, which she dreams of putting into artistic form. But Katya doesn’t have time to make someone else’s dream come true, because she finds her customer shot dead. From this moment on, a quiet existence remains a thing of the past - the hunt for Katya begins. And in order to be saved, she just needs... to figure out the killer. And the circle of suspects is very, very wide: from the oligarch Ivanchenko to Alina’s security guard. And between them there is a whole series of figures capable of villainy. But Katya does not lose heart and, using all her extraordinary logic, boldly takes on the investigation...