Chul-Soo (Hong Jong-Hyun) is the only son of a legendary thief family. He falls in love with Young-Hee (Jin Se-Yun) who is a police officer. Her family is also a police family. To get her parents permission to marry, Chul-Soo undertakes an exam to become a police officer, but both families work to prevent their marriage.

The showdown between a celebrated cop and a serial killer who challenges the former to nab him, results in consequences laced with heavy-duty action, playful romance and dark humor.