Mission: Close a 16-year-old cold case: three teenage girls slain in a small Midwest town. Client: Dana Hall, twin sister of one of the victims. Troubled, amnesiac, alienated from family, suffering from horrific nightmares about the killer's identity. Investigator: William "Spence" Spencer. Thirty-six. Bachelor. Top-notch skills, on the job 24/7. Shows exceptional sensitivity to client's needs. Comments: Significant danger. Escalating threats against...