An inmate named Mars serving a life sentence for killing a cop asks Da Vinci to look into a prison death, but the warden claims there hasn't been one. Da Vinci goes to the prison and finds the death the inmate is talking about is his own. He suffered a heart attack and died on the way to the hospital. He came back to life and therefore believes he's served his life sentence in full and wants Da Vinci to declare him dead so he can get a writ of habeas corpus and get released.
After getting stuck in an elevator with a corpse, Morris tries to figure out who the man is. All he has to go on is undeveloped photos in the man's camera and a recent liver transplant. When he discovers the man's identity, he learns that the liver donor had a peanut allergy, which he believes the dead man then developed (along with a proclivity to photograph his neighbors in the nude). Sunny is not so sure.
Mick and Shannon search for the ten-year-old son of a woman who was found beaten to death in her apartment. The autopsy reveals that she was a cocaine mule. They find the boy and question him about his mother's connections, but keep coming up with dead ends. Finally, the kid points to a viable suspect: a cop.