(Detective Eren/Serial Killer Levi) Trainee Detective Jaeger is given the opportunity of a lifetime when he asked to join the hunt for the Stohess Slasher. If only he'd known what he was signing up for. Turns out his assignment is to solicit help from a another killer, one who is now locked away. His name is Levi Ackerman. To catch a killer Eren must learn to think like one.