Lieutenant General Son
An ace police crisis negotiator, Chae-yoon, is called to the scene where her supervisor is taken hostage. Through the control room monitor, she is faced with the cold-blooded hostage taker, Tae-gu, whose demeanors are difficult to interpret. Against the 21-hour deadline Tae-gu has set, Chae-yoon tirelessly tries to crack the unusually calm perp over multiple video-calls. Eventually, the shocking truth begins to unveil.
Soo-na is a beautiful tattoo artist who possesses the unique skill of being able to perform the rare “stitchery tattoo” that uses needle and thread. This style of tattoo is very painful and she prefers not to do it this way. She also has a habit of mixing in some snake venom into the ink she uses for tattooing. This can cause some interesting and sometimes lethal side-effects whenever her clients are in the heat of passion. In other words, you do not want to mess with Soo-na. Now she has a new client, Ji-soon, who is very persistent in wanting her to use the stitchery tattoo technique. Soo-na gives in and agrees to finish the tattoo of a Medusa on his back. She quickly learns that behind the Medusa lies a dark secret that has ties to her own past. What follows is a tale of revenge, murder, and tattoos.
Director of National Intelligence Service (cameo)
Lee Jang-hwan receives widespread acclaim and media attention after successfully cloning human embryo stem cells. A TV news program PD, Yoon Min-cheol, receives a phone call from an anonymous source who says he has worked with Dr. Lee on the stem cell project. The source blows the whistle on Lee's work, revealing how Lee fabricated research results and engaged in unethical practices.
Lee Heung-gi
In the early 1980s, South Korea is torn by student protests over the lack of representation in the government. Song Woo-Seok is a successful attorney in Busan specializing in tax law. His views regarding civil liberties are changed by student activist Park Jin-woo. When Jin-Woo is brutally tortured and put on trial for his activism, Woo-seok decides to defend Jin-woo as his client.
Section chief
Poongsan has the unenviable - and death-defying - job of delivering messages across the North and South Korean border to separated families. When South Korean government agents ask him to smuggle in In-ok, the lover of a high-ranking North Korean defector, into the South, the damsel and rescuer fall in love instead.
In June 1950, soon after the start of the Korean War, a troop of North Korean soldiers enter a small South Korean village. Captain Jeong-woong proclaims that they came to liberate the villagers but their true agenda is to ferret out the reactionaries. The villagers and Seol-hee, who is separated from her fiance on her wedding day, offer them heartfelt hospitality and cooperation to avoid falling out of the army's favor. Eventually friendships starts to build up between the soldiers and the villagers.
Police Officer
In the aftermath of a car crash, a man discovers his dreams are tied to a stranger's sleepwalking.
President Park
Gang-pae is #2 gangster in his organization who longs to become an actor. Su-ta is a superstar actor who takes on the role of a gangster in an action movie called Rough Cut. When another actor leaves the set due to Su-tas violent ways, the production is on the verge of shutting down. Su-ta asks Gang-pae, whom he met by chance, to play alongside him in the movie in order to save the production.
Prosecutor Jung
Desperate to discover who framed him for murder, criminal Su-hyun escapes from police custody and crosses path with cop Sung-woo. After realizing they have a mutual enemy, the two form an unlikely alliance and together go looking for payback.
