Was the AIDS virus created during an experi­ment that got out of hand at Fort Detrick, the Pentagon's top security genetic laboratory?

Stefan (Tom Wlaschiha) is an East German medical stu­dent. His late father was a high-ranking AIDS scientist in the former GDR. Determined to pickup where his father left off, Stefan makes use of a medical conference in San Francisco to search for surviving witnesses to alleged biogenetic tests on humans.

As he searches for the survivors, the city is filled with excitement over the eagerly awaited opening of Puccini's Turandot. At the same time, gay men are being murdered, and police detective Louise Tolliver is trying to solve the case.

Time and again, Stefan comes across clues left by the unknown murderer who is rumored to have hummed the aria "Nessun dorma" as he killed his victims. Then, as if drawn by some strange power, Stefan falls in love with. the reserved and seemingly hard­ hearted Jeffrey, who has long been diag­nosed HIV positive. As the murderer strikes again, Stefan finds himself not only a suspect in the case but possibly the next victim.