The movie depicts the three months before Choong-nyung (the future Sejong the Great) becomes king. The Annals of the Joseon Dynasty, which follows the history of the Joseon Dynasty between 1413 and 1865, leaves out records of this crucial period. While future generations would come to know him as King Sejong, the legendary figure who created the Korean alphabet and advanced the country’s scientific research and law, Prince Choong-nyung was originally dismissed as a reclusive bookworm. When his older brothers Yangnyeong and Hyoryeong fail to impress their father King Taejong, the king makes a royal command for Choong-nyung to become the next ruler of the kingdom instead.

When his client suddenly confesses to murder in open court, a hotshot attorney embarks on a search for truth to redeem his ruined reputation.

In an insurance company, Yoon, who is an outsider, has a power to see people’s past and read their minds. Mr. Park, Yoon’s boss, assumes that she has some kind of special power, decides to test her ability. At very late night when everyone has gone home, Mr. Park brings Yoon to a storage room where there are full of case reports. Among them, Mr. Park picks three doubtful cases. He asks Yoon to tell him what exactly happened. Yoon, who senses some dark aura wandering around him, tells the story of each case. Every time Yoon finishes each case, the dark aura gets darker and bigger and Yoon tries to warn Mr. Park about it. Would Mr. Park able to escape from the dark aura?