A boy transfers to a school in the countryside, where he finds himself attracted to a mysterious girl. The girl lives alone with her mental patient father and enjoys skating alone on the lake at night. Villagers and classmates spread rumors about the girl, but the boy doesn’t care. Then one day, her father disappears and the boy becomes witness to suspicious activity. Other than a few documentaries, this is Choi Jin-seong’s first feature film. Steel Cold Winter is no normal teenage love story.
Jang-woo had only his sister to live for until she is brutally murdered. During a ritual to send her spirit to heaven, he comes across a suspicious man, who manages to escape from the scene. He begins to suspect a local pharmacist and keeps an eye on him. Although Jang-woo is absolutely convinced that the pharmacist is the killer, no one believes him because the pharmacist is considered the kindest man in town. But he gets help from a possessed woman named Si-eun who foresees how people die. Their pursuit begins and Si-eun predicts yet another murder.
Jae-ho, who aims to become the number one in a crime organization, gets to build up trust with Hyun-su, an ambitious newbie in the prison. While they try to take over the organization after the prison release, their ulterior motives starts to emerge.
Two best friends, So-yool and Yeon-hee, dream of becoming the top artists in Seoul together. But their friendship doesn’t last long as Yoon-woo, So-yool’s first love and songwriter, falls in love with Yeon-hee and her voice. So-yool’s feeling of jealousy and inferiority towards Yeon-hee grows by the day, and she eventually makes a drastic decision to bring the two lovers down.
On the way to his mother’s funeral, a detective accidentally hits a person with his car. He takes the body with him and puts it into his mother’s coffin. The moment he feels relieved, he receives a call. This caller insists that he saw the detective’s hit-and-run, but instead of asking for money, he wants to know about the body’s whereabouts, leading to a do-or-die showdown of the witness and detective.
A 5 member gang, led by Seok-Tae (Kim Yun-Seok), kidnaps a baby boy named Hwa-Yi and raises the baby like their own son. The baby boy is now 17 years old (Yeo Jin-Goo) and has turned into a lethal killer. Taking part in his father’s gang, Hwa-Yi learns about his own past. Hwa-Yi pulls out his gun to find out who he really is.