“Just One: The True Story of Patient Zero” tells the story of the person commonly referred to as “patient zero” — the first Soviet citizen diagnosed with HIV. The official history of the epidemic in the USSR begins with this 1987 case, a crisis that has since affected millions in Russia: those living with the virus and those who have died from AIDS. Yet almost nothing is known about this individual. The few existing facts have long dissolved into myths, propaganda, and misinformation. No photographs, no footage — nothing. The biography of “patient zero” had to be reconstructed from scratch, turning the film into a historical investigation.