Lee Woo Gyeom is arrested in connection with a string of mysterious deaths. He insists that his groundbreaking medical work, focused on blood transfusions, is designed to save lives.

Woo Gyeom offers to cure Han Joon's terminally ill daughter in exchange for legal defense. With public opinion turning against him, Han Joon risks everything to find evidence supporting Woo Gyeom's unorthodox methods.

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.

A potential breakthrough occurs when Woo Gyeom's blood is linked to miraculous recoveries. Han Joon works to secure a public demonstration of the treatment, hoping to change perceptions.

Chairman Chae offers Han Joon a deal that could save his daughter, with Woo Gyeom's treatment at the center. However, as new revelations surface, Han Joon faces difficult moral decisions and growing pressure.

As the investigation deepens, Yi Yeon uncovers troubling details that suggest Woo Gyeom's past is more complicated than anyone thought. Han Joon, desperate to save his daughter, turns to Woo Gyeom for help.

Woo Gyeom and Han Joon are forced to go on the run, pursued by those who will stop at nothing to control the cure. As they face danger at every turn, Yi Yeon uncovers deeper connections to illegal practices.

Woo Gyeom's troubled past comes to light, revealing dark secrets that have driven his actions. As the final confrontation looms, he makes a bold move to confront those who wronged him.