What happens in the aftermath of a devastating natural disaster? When a 6.5-magnitude earthquake strikes Seoul, a medical disaster team tries to help the survivors and restore order to the paralyzed city. Lee Hae Sung (Kim Young Kwang) is a passionate trauma surgeon who always puts the needs of his patients above all other concerns. But his altruistic approach puts him at odds with the calculating hospital director Park Gun (Lee Kyoung Young) and surgery chief Han Woo Jin (Ha Seok Jin). Jung Ddol Mi (Jong So Min), a third-year resident from Pusan, is thrust into the chaos after delivering a patient to Mirae Hospital in Seoul and stays to help out Hae Sung, along with psychiatrist Park Ji Na (Yoon Joo Hee) and nurse Kim Hyun Sook (Kim Jae Hwa). Kang Joo Ran (Kim Hye Eun), the emergency department chief who is put in charge of the hospital’s Disaster Medical Assistance Team. has the impossible task to keep the hospital running despite depleting resources, even as her own missing 7-year-old son tugs at her heart. Her fiancé, Goo Ja Hyuk (Cha In Pyo), is a natural disaster expert who is promoted to a cabinet minister to help Seoul through the crisis. An Dae Gil (Lee Sung Yeol) is a first-year resident who tries to help a childhood friend who is injured. Hae Sung will do anything for his patients while he also tries to keep his own comatose mother alive. Can he and the other doctors at the forefront of the tragedy help the city to recover from the devastating event? “D-Day” is a 2015 South Korean drama series directed by Jung Yong Woo.