When you have eliminated the impossible, whatever remains, however improbable, must be the truth Kim Seolhyun is, despite her youth, the leader of the Serious Crimes Division in the Busan PD. Her job is to investigate, well, serious crimes, along with her assistants: Kwon Mina, Seo Yuna, Kim Chanmi and Bae Joohyun. Shin Hyejeong is an aspiring CSI contractor, Kim Seolhyuns former high school flame, and Kang Seulgis best friend. She and Seolhyun were the founding (and only) members of the Crime Club in their high school, specialising in solving whodunits and helping the local police in investigations. When Seolhyun is dispatched to investigate a serial killer that had taken the lives of 5 young, 20-ish year old girls, she meets Hyejeong, who is interning as an assistant on the crime scene. Can the two ex-lovers reunite to solve one last mystery? And will they rekindle their relationship along the way? ForewordHey guys~ Mac here. This fic is for those who are bored by the highschool!au in my other ongoing fic and want something different that is not a oneshot. Although there are RV characters in this story, this fic is still mainly seoljeong and yunaring focused, with occasional mentions of seulrene. As from the description above, this will be a detective!au based fic, which I am hoping will give what I write as well as the AOA fics on this site some variety.This fic will last anywhere between 5 and 20 chapters, depending on how positive the response is from yall. In addition, it will be narrated from the perspective of Seolhyun (in 3rd person, though), and you the reader will try to solve the mystery of who the killer is alongside Seolhyun.This fic will be updated alongside my main fic FL, not in place of it. The first chapter should be coming out soon :)Mac out~  The fantastic poster is done by the wonderful people over at Eunoia Graphics Shop!