Jung Tae-Hun (Kim Sang-Kyung) is the chief doctor of a trauma center in a hospital. His son suddenly collapses with a lung disease. Soon, his wife Han Gil-Ju (Seo Young-Hee) suddenly dies because of the same lung disease. Jung Tae-Hun tries to find a common link between their illnesses. Jung Tae-Hun learns that for several years, many people have visited hospitals and complained of similar symptoms as his wife and son. He finally finds a common link between all of these people. They all used a humidifier disinfectant. Meanwhile, Han Gil-Ju's sister Han Young-Ju (Lee Sun-Bin) works as a prosecutor. She also investigates the case with Jung Tae-Hun, but her office doesn't let her investigate the case. Han Young-Ju quits her job as a prosecutor and begins to work as a lawyer. She continues to investigate the lung disease case with Jung Tae-Hun. As they visit victims and collect materials, they uncover the secret of the acute lung disease.
Trailer
Cast
Yong-sun Jo
Director
Jang Gwang
Member of Parliament Park
Jeong Ho-bin
Chief prosecutor
Jang Hyuk-jin
Representative Jo
Jeong-tae Kim
Han Hyeon-jong
Ji-Hoon Lee
In-ho
Sun-Bin Lee
Han Yeong-joo
Hwang Man-Ik
Presiding judge
Kim Sang-kyung
Jeong Tae-hoon
Yeong-hie Seo
Han Gil-joo
Young-kyu Song
Jeong Kyeong-han
Byoung-Sook Sung
Soon-yeong's mother
Lee Yoo-Joon
Section chief Yang
Ui-chul Jung
Dr. Choo Seong-mo
Kyung Ho Yoon
Seo Woo-sik
Yong-sun Jo
Writer
So Jae-Won
Writer
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