The prosperous owner of a travel agency, Elena Dudareva, has been murdered. The police manage to find a nearly blind young man named Artyom who had spoken with the killer. Artyom cannot describe the killer's appearance, but he clearly remembers his voice and the music the man was listening to. In solving this contract murder, Nastya Kamenskaya must answer a difficult question: does she have the right to involve a disabled young man in the dangerous search for the killer?