Winter of 1598, the story of Yi Sun-shin's last naval battle during the Japanese invasions of Korea that happened in the Noryang Strait.

Follows the revenge story of a group of people — including Eun-yong, a money trader — who refuse to remain silent in the face of unjust authorities and fight against a cartel conspiring with the law.

Han Yi Han was an elite surgeon. He graduated at the top of the best medical school in South Korea and he specialized in two departments: general surgery and cardiothoracic surgery. One surgery changed his life. Han Yi Han believe he did well on that surgery, but the patient died. He then got his medical license revoked. Four years later, Han Yi Han works as a lawyer, specializing in medical litigation. He also tries to uncover the truth behind the death of his former patient. For his trials, Han Yi Han defends victims and tries to punish those that commit medical malpractice and negligence. He works with a public prosecutor, who lost a family member and a lover due to the surgery Han Yi Han performed.

During a visit to his motherland, a Korean-Italian mafia lawyer gives an unrivaled conglomerate a taste of its own medicine with a side of justice.

Kim Seo-Jin (Shin Sung-Rok) is a man who is driven only to achieve success in his life. Thanks to his efforts, he is the youngest executive at his company. His life is perfect, with his beautiful violinist wife Kang Hyun-Chae (Nam Gyu-Ri) and a daughter. His wonderful life comes to a halt when his young daughter is kidnapped. He falls deep into despair. To change the past, when his daughter was kidnapped, he contacts Han Ae-Ri (Lee Se-Young) approximately one month in the past. Han Ae-Ri has busy days with her studies and working a part-time job to make enough money to pay for her sick mother's operation. One day, her mother suddenly goes missing. Han Ae-Ri falls into despair, when Kim Seo-Jin from the future contacts her.

Lee Ahn has the ability to read a person's secrets as soon as he touches them. He meets a woman who has secrets that she desperately tries to hide. The two team up to bring down criminals.

Nam Shin is a son from a family who runs a large company. After an unexpected accident, he falls into a coma. His mother Oh Ro-Ra is an authority on brain science and artificial intelligence. She creates an android named Nam Shin III which looks like just like her son Nam Shin. The android pretends to be Nam Shin and he has a bodyguard So-Bong.

Despite their harsh educational environment, the cheerleading club has to keep it together for the students' sakes, and their own.

A resistance group in Japanese-occupied Korea breaks a sniper out of prison to carry out an assassination, unaware that a traitor lurks among them.