The plot centres on Sofia Verbyana, a young, talented investigator who, after graduating from the academy, joins the police force as head of the particularly dangerous crimes department. She is enthusiastic, ready to defend the truth, sharp-minded, honest and principled. However, due to her lack of experience, she often makes mistakes and appears uncertain. Her meeting with forensic expert Pavel becomes another test for her. He is silent, sharp-tongued and straightforward. Despite communication difficulties, Sofia and Pavel successfully solve the most complex crimes. But perhaps, without realising it, they begin to feel something more than professional interest.