Ji-yeon is a successful lawyer and single mother to a seven-year-old girl. On her daughter’s field day, Ji-yeon competes with other parents in a running race and almost comes in the first place. However, nowhere could she find the girl who’s been watching and rooting for her mother to win. Later that day, Ji-yeon’s receives a phone call from an anonymous man, who tells her he has her daughter in custody and proposes a deal. To see her daughter alive, Ji-yeon needs to prove a convicted murderer not guilty on his second trial, only within a week. Ji-yeon tries to convince herself the murderer should be innocent, but the encounter with the victim’s mother makes her understand what drove crime-to-crime.
Romance can bloom out of the strangest events. Sometimes even very embarrassing ones. Running after a pickpocket, Detective Kang Jae Hyuk (Lee Dong Wook, My Girl) finds out how problematic journalist Choi Soo Jin (Hyun Young, The Art of Seduction) can be when the skewer that holds her delicious treat magically ends up impaled in his abdomen. Things become more complicated when Kang becomes the police's media rep, as Choi is transferred to crime reporting. The reality show that ensues ("The Choi vs. Kang Report") enables the bickering pair to pursue a crime boss for the benefit of both their careers. But the two start to form a reluctant but formidable alliance: he's good looking, a great fighter, and a good detective. And she's determined to get her story done. Together, they make The Perfect Couple.