Escape from the stuffy metropolis to the warm sea - what could be more beautiful in the hot summer? Nadya Mitrofanova was happy: she and Dima would spend these few days in the south together! Even if he is passionate about his journalistic investigation, she is ready to help him find out who is really to blame for the death of a girl under the propellers of a yacht. But soon Poluyanov was already persuading Nadya to return home: their vacation was becoming more dangerous and unpredictable every day. After several people involved in this case died - allegedly by accident, of course! – the journalist and his girlfriend began to seriously fear that they might find themselves in their place...