Lewis, Hathaway and Hobson look around the new crime scene as Carl Drew, Stella Drew, Martha Seager, Adam Tibbit, Graham Yardley and Adam's girlfriend Rachel Cliff wait anxiously. The body is revealed to be that of Soo-Min Chong, a Korean student who vanished 15 years ago. Seager was the last person to see her alive, Carl Drew was her boyfriend, and she was Martha's organ scholar at the chapel. Hathaway is later shocked to discover Adam's body at the school, with a simple suicide note. Carl, Adam's former teacher believes that he must have pushed the boy too hard. Forensics end up revealing a close relative of Adam's had been in Seager's car. After Martha is found stabbed to death, Lewis and Hathaway start to close in on the killer who is becoming more desperate to cover their tracks.