A well-known doctor, Professor Jerzy Abramski, is murdered. The case is handled by Commissioner Wojciech Samborski ("Sambor") and Junior Officer Marta Zadara. They both assume that behind the professor's murder there is his lover, and she is responsible. However her sudden death changes everything. The "Helpful Hand" Foundation, founded by Professor Amramski attracts the attention of the police. The police investigation is hampered by the fact that Sambor and Marta are hiding their relationships from others. Gradually they discover a tangle of corruption, lucrative modern form of trade of human organs and attempts to sell sensitive information about soldiers DNA. In the end they would have to decide what's more important their relationship or interior security.