- Character
- The Best Point
- Behind Scene
- 싸인에 중독될 수 밖에 없는 이유
- Interview
- Cutting Through the Sign

Episodes: 20

Revered actor Park Shin Yang (Lovers in Paris, The Painter of the Wind) returns to dramas as a brilliant forensic investigator in crime thriller Sign. Kim Ah Joong, who shot to stardom in the film 200 Pounds Beauty, is his rookie love interest, while Uhm Ji Won (The Woman Who Still Wants to Marry) and Jung Gyu Woon (Dr. Champ) round out a solid cast. The drama, with its unusual crime investigation storyline (paired with a little romance), hit the ground running with high ratings and has been called the Korean C.S.I.

Go Da Kyung (Kim Ah Joong) has been successful working as a forensic doctor at a coroner's office, but what she really wants to do is investigate the crime scenes themselves, not just the bodies. She manages to get a job as a rookie investigator paired with famed forensic doctor Yoon Ji Hoon (Park Shin Yang). The eager newbie and prickly veteran initially struggle against each other as they strive to solve crimes through the tiny details they find, utilizing science to solve murders.

Jung Woo Jin (Uhm Ji Won), a ruthless prosecutor and Ji Hoon's ex, attempts to use their findings for her own ends, while Da Kyung clashes with impetuous police officer Choi Yi Han (Jung Gyu Woon). Da Kyung and Ji Hoon must balance personal entanglements with professional life in their quest to uncover the truth behind murder, and the two develop a complex relationship.