There have been more than ten disappearances reported in Guam lately. While investigating, the police arrest Lee Woo Gyeom as a suspect. He confesses that he killed 17 people, and Prosecutor Cha Yi Yeon takes the case. The case looks simple, but Woo Gyeom claims something strange. Meanwhile, Woo Gyeom asks Attorney Park Han Jun to take his case.

Han Jun suspects both Woo Gyeom's abilities and his intentions. However, after meeting an actual patient who was treated and cured by Woo Gyeom, Han Jun decides to take on the case and win it. Meanwhile, persuading Woo Gyeom's patients to testify in court proves to be difficult, and Woo Gyeom makes an unexpected move of his own to secure victory.

In an effort to change the direction of the trial, Han Joon argues that Woo Gyeom’s medical work is a legitimate research breakthrough rather than a criminal act. As the legal battle intensifies, both sides present conflicting evidence, and the court is left to decide the fate of Woo Gyeom’s groundbreaking treatment.