Quincy satisfies his knowledge thirst with a further educational journey through different prisons. Completely exhausted by the new impressions, he finally gets sleepy while driving so a sheriff decides to take him to a small, urban prison for one night. Promptly that night in the prison cells, a fire erupts. Four prisoners die in the flames. In a conversation with Quincy the prison doctor confides a hunch that the blaze was provoked to cover up the murder of a temporary prisoner. Quincy offers his assistance as a coroner to his colleague and some clues begin to confirm the prison doctor's suspicions.