Da Vinci investigates the deaths of Ray Stone and Gloria Keane. It looks to be a double suicide, with a succinct suicide note for the pair: "AIDS x 2". Some alarm bells ring in Da Vinci's head when he finds some prescription bottles for AIDS medication in their apartment, as the prescribing doctor is Gus Cook, whose license was once pulled by Da Vinci for malpractice and who Da Vinci is currently investigating concerning the recent death of a boxer. Meanwhile, a woman by the name of Kathleen Mills comes in to speak to Shannon and Williams because of her nightmares. Six months prior, she saw a decapitated head in a bucket in the van of the friend of her then boyfriend, Alvin Pike. The car belonged to Daryl Cunningham, the head she recognized as belonging to Daryl and Alvin's friend, Cory James. Since Alvin is currently incarcerated, Shannon and Williams decide to question Cunningham, who still owns the van. With much circumstantial evidence in hand, Shannon and Williams try to get ...