A young screenwriting student, Maria, turns to Katya and Georgiy, the owners of a detective agency, for help. The girl is in despair: according to the law, she is the heir to the fortune of businessman Pesin, which is why her cousin has launched a real hunt for her. Detective Lihogon, hired by her cousin, is watching the girl. That same mediocre detective, Georgy's competitor... The matter takes a new turn, and now Georgy seeks not only to help Maria, but also to teach the enemy a lesson. And Masha begins to behave extremely strangely. Katya has suspicions... What is this - banal female jealousy? Or is the student screenwriter playing a dangerous movie?..