Lee Jung Do's father is a swindler and intends to resume his old habits as soon as he gets out of prison, even though he has promised his son to go straight. Because of his father's record, LJD had a hard time finding jobs, but overcomes these obstacles, passes the law exams, and becomes a prosecutor. Oh Young Joo is a detective, and her precinct is in LJD's neighborhood. Kim Joon Ki, who comes from a well-off family, is also keen to become a prosecutor. He meets OYJ on a blind date and continues to pursue her even though she isn't interested. Moon Chae Ri is a small time swindler who hooks up with LJD's dad on a last heist plan, before fulfilling his promise to his son to stay out of trouble.

• Park Gun-hyung
• Lee Ha-na
• Kim Nam-gil
• Park Si-yeon
• Lee Soon-jae
• Lee Bo-hee
• Seo Hyo-rim
• Kang Boo-ja