Seven years of age, Hee Joo, loses her investigator, single parent to Ki Beom, a famous chronic executioner who is gotten subsequent to killing his swindling sweetheart and condemned to just 15 years in jail on the grounds that the court neglected to find proof connecting him to different killings. Analyst Dae Yeong takes in Hee Joo and raises her. After fifteen years, Hee Joo is the mascot of the police region, where she chips in. At the point when Ki Beom is let out of jail, he gets complicatedly engaged with the young lady who has been holding up 15 years to figure out who killed her dad.