Seohyun who is a mother of a son and a detective, is bubbly person turn to gloomy and quite since her husband died.Kyuhyun who is witty and childish person, doesn’t want to work with anyone because he thought he born with a genius brain..but Seohyun and Kyuhyun supposed to be a partner as worker. At the same time, Seohyun wanted to solve her husband cases alone and killed the person which had murder her husband. Will Seohyun solves the case easily or it will turn to be complicated one?  THE CASTJung Seohyun -a detective , a kind and lovelyCho Kyuhyun- a detective, witty and childishCho Changmin- an inspector, kind and helpful *maybe ^^Im Yoona- a detective, Seohyuns bestfriendLee Donghae- an inspector, Kyuhyuns bestfriendJung Manse -Seohyuns son  Forewordinspired by drama "The Partner" and collabration incident cases from japan comic " Detective Conan".